Encyclopedia - Orthorhombic

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z
By classes By crystal systems  By chemistry Mineral list
Minerals for sale Encyclopedia  Glossary

All minerals 1€ to 20€ 20€ to 100€ 100€ to 250€ Up to 250€

All minerals 1€ to 20€ 20€ to 100€ 100€ to 250€ Up to 250€All minerals 1€ to 20€ 20€ to 100€ 100€ to 250€ Up to 250€

MINERALS OF ORTHORHOMBIC SYSTEM

.

Adamite

Class : Phosphates, arsenates, vanadates
Subclass : Anhydrous arsenates
Crystal system : Orthorhombic
Chemistry : Zn₂(AsO₄)(OH)
Rarity : Fairly common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Adelite

Class : Phosphates, arsenates, vanadates
Subclass : Anhydrous arsenates
Crystal system : Orthorhombic
Chemistry : CaMg(AsO₄)(OH)
Rarity : Very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Aeschynite

Class : Oxides and hydroxides
Subclass : Oxides
Crystal system : Orthorhombic
Chemistry : (Ce,Ca,Fe,Th)(Ti,Nb)₂(O,OH)₆
Rarity : Very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Aikinite

Class : Sulfides and sulfosalts
Subclass : Sulfosalts
Crystal system : Orthorhombic
Chemistry : PbCuBiS₃
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Amphibole

Class : Silicates
Subclass : Inosilicates
Crystal system : Orthorhombic or monoclinic
Chemistry : WX₂Y₅Si₈O₂₂(OH)₂
Rarity : Very common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Ancylite

Class : Carbonates, Nitrates, Borates
Subclass : Hydrated carbonates
Crystal system : Orthorhombic
Chemistry : SrCe(CO₃)₂(OH) H₂O
Rarity : Fairly common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Andalusite

Class : Silicates
Subclass : Nesosilicates
Crystal system : Orthorhombic
Chemistry : Al₂SiO₅
Rarity : Very common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Andorite

Class : Sulfides and sulfosalts
Subclass : Sulfosalts
Crystal system : Orthorhombic
Chemistry : PbAgSb₃S₆
Rarity : Very rare to rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Anglesite

Class : Sulphates, molybdates, chromates
Subclass : Anhydrous sulphates
Crystal system : Orthorhombic
Chemistry : PbSO₄
Rarity : Common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Anhydrite

Class : Sulphates, chromates, molybdates
Subclass : Anhydrous sulfates
Crystal system : Orthorhombic
Chemistry : CaSO₄
Rarity : Very common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Anthophyllite

Class : Silicates
Subclass : Inosilicates
Crystal system : Orthorhombic
Chemistry : (Mg,Fe)₇Si₈O₂₂(OH)₂
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Antlerite

Class : Sulphates, chromates, molybdates
Subclass : Anhydrous sulfates
Crystal system : Orthorhombic
Chemistry : Cu₃SO₄(OH)₄
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Aragonite

Class : Carbonates, nitrates, borates
Subclass : Anhydrous carbonates
Crystal system : Orthorhombic
Chemistry : CaCO₃
Rarity : Very common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Ardennite

Class : Silicates
Subclass : Sorosilicates
Crystal system : Orthorhombic
Chemistry : Mn₄(Al,Mg)₆(SiO₄)₂(Si₃O₁₀)[(As,V)O₄](OH)₆
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Argentopyrite

Class : Sulfides and sulfosalts
Subclass : Sulfides
Crystal system : Orthorhombic
Chemistry : AgFe₂S₃
Rarity : Uncommon to rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Argyrodite

Class : Sulfides and sulfosalts
Subclass : Sulfides
Crystal system : Orthorhombic
Chemistry : Ag₈GeS₆
Rarity : Very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Arsendescloizite

Class : Phosphates, arsenates, vanadates
Subclass : Anhydrous arsenates
Crystal system : Orthorhombic
Chemistry : PbZn(AsO₄)(OH)
Rarity : Rare to very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Atacamite

Class : Halides
Subclass : Oxychlorides
Crystal system : Orthorhombic
Chemistry : Cu₂Cl(OH)₃
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Austinite

Class : Phosphates, arsenates, vanadates
Subclass : Anhydrous arsenates
Crystal system : Orthorhombic
Chemistry : CaZn(AsO₄)(OH)
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Autunite

Class : Phosphates, arsenates, vanadates
Subclass : Phosphates
Crystal system : Orthorhombic
Chemistry : Ca(UO₂)₂(PO₄)₂ 10H₂O
Rarity : Common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Barite

Class : Sulphates, chromates, molybdates
Subclass : Anhydrous sulphates
Crystal system : Orthorhombic
Chemistry : BaSO₄
Rarity : Very common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Batisite

Class : Silicates
Subclass : Inosilicates
Crystal system : Orthorhombic
Chemistry : Na₂BaTi₂(Si₂O₇)₂
Rarity : Very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Bavenite

Class : Silicates
Subclass : Inosilicates
Crystal system : Orthorhombic
Chemistry : Ca₄Be₂Al₂Si₉O₂₆(OH)₂
Rarity : Fairly common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Becquerelite

Class : Oxides and hydroxides
Subclass : Uranyl hydroxides
Crystal system : Orthorhombic
Chemistry : Ca(UO₂)₆O₄(OH)₆ 8H₂O
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Berthierite

Class : Sulfides and sulfosalts
Subclass : Sulfosalts
Crystal system : Orthorhombic
Chemistry : FeSb₂S₄
Rarity : Fairly common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Bertrandite

Class : Silicates
Subclass : Sorosilicates
Crystal system : Orthorhombic
Chemistry : Be₄Si₂O₇(OH)₂
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Billietite

Class : Oxides and hydroxides
Subclass : Uranyl hydroxide
Crystal system : Orthorhombic
Chemistry : Ba(UO₂)₆O₄(OH)₆ 4H₂O
Rarity : Very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Bismuthinite

Class : Sulfides and sulfosalts
Subclass : Sulfides
Crystal system : Orthorhombic
Chemistry : Bi₂S₃
Rarity : Common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Boehmite

Class : Oxides and hydroxides
Subclass : Hydroxides and hydrates
Crystal system : Orthorhombic
Chemistry : AlO(OH)
Rarity : Common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Boracite

Class : Carbonates, nitrates, borates
Subclass : Borates
Crystal system : Orthorhombic
Chemistry : Mg₃B₇O₁₃Cl
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Bornite

Class : Sulfides and sulfosalts
Subclass : Sulfides
Crystal system : Orthorhombic
Chemistry : Cu₅FeS₄
Rarity : Common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Bournonite

Class : Sulfides and sulfosalts
Subclass : Sulfosalts
Crystal system : Orthorhombic
Chemistry : PbCuSbS₃
Rarity : Quite common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Brenkite

Class : Carbonates, nitrates, borates
Subclass : Anhydrous carbonates
Crystal system : Orthorhombic
Chemistry : Ca₂CO₃F₂
Rarity : Very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Brookite

Class : Oxides and hydroxides
Subclass : Oxides
Crystal system : Orthorhombic
Chemistry : TiO₂
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Caledonite

Class : Sulfates, chromates, molybdates
Subclass : Anhydrous sulfates
Crystal system : Orthorhombic
Chemistry : Pb₅Cu₂(CO₃)(SO₄)₃(OH)₆
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Carminite

Class : Phosphates, arsenates, vanadates
Subclass : Anhydrous arsenates
Crystal system : Orthorhombic
Chemistry : PbFe₂(AsO₄)₂(OH)₂
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Carnallite

Class : Halides
Subclass : Chlorides
Crystal system : Orthorhombic
Chemistry : KMgCl₃ 6H₂O
Rarity : Quite common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Carpholite

Class : Silicates
Subclass : Inosilicates
Crystal system : Orthorhombic
Chemistry : MnAl₂Si₂O₆(OH)₄
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Cavansite

Class : Silicates
Subclass : Phyllosilicates
Crystal system : Orthorhombic
Chemistry : Ca(VO)Si₄O₁₀ 4H₂O
Rarity : Very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Celestite

Class : Sulfates, chromates, molybdates
Subclass : Anhydrous sulfates
Crystal system : Orthorhombic
Chemistry : SrSO₄
Rarity : Common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Cerussite

Class : Carbonates, nitrates, borates
Subclass : Anhydrous carbonates
Crystal system : Orthorhombic
Chemistry : PbCO₃
Rarity : Common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Cervantite

Class : Oxides and hydroxides
Subclass : Oxides
Crystal system : Orthorhombic
Chemistry : Sb₂O₄
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Chalcomenite

Class : Oxides and hydroxides
Subclass : Selenites
Crystal system : Orthorhombic
Chemistry : CuSeO₃ 2H₂O
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Chalcostibite

Class : Sulfides and sulfosalts
Subclass : Sulfosalts
Crystal system : Orthorhombic
Chemistry : CuSbS₂
Rarity : Uncommon to rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Childrenite

Class : Phosphates, arsenates, vanadates
Subclass : Anhydrous phosphates
Crystal system : Orthorhombic
Chemistry : FeAl(PO₄)(OH)₂ H₂O
Rarity : Quite common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Chrysoberyl

Class : Oxides and hydroxides
Subclass : Oxides
Crystal system : Orthorhombic
Chemistry : BeAl₂O₄
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Chrysocolla

Class : Silicates
Subclass : Phyllosilicates
Crystal system : Orthorhombic
Chemistry : CuSiO₃ 2H₂O
Rarity : Common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Cobaltite

Class : Sulfides and sulfosalts
Subclass : Sulfides
Crystal system : Orthorhombic
Chemistry : CoAsS
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Columbite

Class : Oxides and hydroxides
Subclass : Oxides
Crystal system : Orthorhombic
Chemistry : (Fe²⁺,Mn²⁺,Mg²⁺)(Nb,Ta)₂O₆
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Compreignacite

Class : Oxides and hydroxides
Subclass : Uranyl hydroxides
Crystal system : Orthorhombic
Chemistry : K₂(UO₂)₆O₄(OH)₆ 8H₂O
Rarity : Very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Conichalcite

Class : Phosphates, arsenates, vanadates
Subclass : Anhydrous arsenates
Crystal system : Orthorhombic
Chemistry : CaCu(AsO₄)(OH)
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Cordierite

Class : Silicates
Subclass : Cyclosilicates
Crystal system : Orthorhombic
Chemistry : Mg₂Al₄Si₅O₁₈
Rarity : Common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Cornetite

Class : Phosphates, arsenates, vanadates
Subclass : Anhydrous phosphates
Crystal system : Orthorhombic
Chemistry : Cu₃PO₄(OH)₃
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Cosalite

Class : Sulfides and sulfosalts
Subclass : Sulfosalts
Crystal system : Orthorhombic
Chemistry : Pb₂Bi₂S₅
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Cotunnite

Class : Halides
Subclass : Chlorides
Crystal system : Orthorhombic
Chemistry : PbCl₂
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Cubanite

Class : Sulfides and sulfosalts
Subclass : Sulfides
Crystal system : Orthorhombic
Chemistry : CuFe₂S₃
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Curienite

Class : Phosphates, arsenates, vanadates
Subclass : Uranyl vanadates
Crystal system : Orthorhombic
Chemistry : Pb(UO₂)₂(VO₄)₂ 5H₂O
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Curite

Class : Oxides and hydroxides
Subclass : Uranyl hydroxides
Crystal system : Orthorhombic
Chemistry : Pb₃(UO₂)₈O₈(OH)₆ 3H₂O
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Cyanotrichite

Class : Sulphates, chromates, molybdates
Subclass : Hydrated sulphates
Crystal system : Orthorhombic
Chemistry : Cu₄Al₂(SO₄)(OH)₁₂ 2H₂O
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Danburite

Class : Silicates
Subclass : Tectosilicates
Crystal system : Orthorhombic
Chemistry : CaB₂(SiO₄)₂
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Dawsonite

Class : Carbonates, nitrates, borates
Subclass : anhydrous carbonates
Crystal system : Orthorhombic
Chemistry : NaAlCO₃(OH)₂
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Derriksite

Class : Oxides et hydroxides
Subclass : Uranyl selenites
Crystal system : Orthorhombic
Chemistry : Cu₄(UO₂)(SeO₃)₂(OH)₆
Rarity : Very Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Descloizite

Class : Phosphates, arsenates, vanadates
Subclass : Anhydrous vanadates
Crystal system : Orthorhombic
Chemistry : PbZn(VO₄)(OH)
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Diaspore

Class : Oxides and hydroxides
Subclass : Hydroxides and hydrates
Crystal system : Orthorhombic
Chemistry : AlO(OH)
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Duftite

Class : Phosphates, arsenates, vanadates
Subclass : Anhydrous arsenates
Crystal system : Orthorhombic
Chemistry : PbCu(AsO₄)(OH)
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Dumortierite

Class : Silicates
Subclass : Nesosilicates
Crystal system : Orthorhombic
Chemistry : Al₇(BO₃)(SiO₄)₃O₃
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Dundasite

Class : Carbonates, nitrates, borates
Subclass : Hydrated carbonates
Crystal system : Orthorhombic
Chemistry : PbAl₂(CO₃)₂(OH)₄ H₂O
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Dyscrasite

Class : Sulfides and sulfosalts
Subclass : Antimonides
Crystal system : Orthorhombic
Chemistry : Ag₃Sb
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Edingtonite

Class : Silicates
Subclass : Tectosilicates
Crystal system : Orthorhombic
Chemistry : BaAl₂Si₃O₁₀ 4H₂O
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Elpidite

Class : Silicates
Subclass : Inosilicates
Crystal system : Orthorhombic
Chemistry : Na₂ZrSi₆O₁₅ 3H₂O
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Emplectite

Class : Sulfides and sulfosalts
Subclass : Sulfosalts
Crystal system : Orthorhombic
Chemistry : CuBiS₂
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Enargite

Class : Sulfides and sulfosalts
Subclass : Sulfides
Crystal system : Orthorhombic
Chemistry : Cu₃AsS₄
Rarity : Quite common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Enstatite

Class : Silicates
Subclass : Inosilicates
Crystal system : Orthorhombic
Chemistry : MgSiO₃
Rarity : Common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Epidydimite

Class : Silicates
Subclass : Inosilicates
Crystal system : Orthorhombic
Chemistry : NaBeSi₃O₇(OH)
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Epsomite

Class : Sulfates, chromates, molybdates
Subclass : Hydrated sulfates
Crystal system : Orthorhombic
Chemistry : MgSO₄ 7H₂O
Rarity : Common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Euchroite

Class : Phosphates, arsenates, vanadates
Subclass : Hydrated arsenates
Crystal system : Orthorhombic
Chemistry : Cu₂(AsO₄)(OH) 3H₂O
Rarity : Very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Euxenite

Class : Oxides and hydroxides
Subclass : Oxides
Crystal system : Orthorhombic
Chemistry : (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)₂O₆
Rarity : Very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Fayalite

Class : Silicates
Subclass : Nesosilicates
Crystal system : Orthorhombic
Chemistry : Fe₂SiO₄
Rarity : Common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Ferrierite

Class : Silicates
Subclass : Tectosilicates
Crystal system : Orthorhombic
Chemistry : (Na,K)₂MgAl₃Si₁₅O₃₆(OH) 9H₂O
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Ferrimolybdite

Class : Sulfates, chromates, molybdates
Subclass : Molybdates
Crystal system : Orthorhombic
Chemistry : Fe₂(MoO₄)₃ 8H₂O
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Ferrisicklerite

Class : Phosphates, arsenates, vanadates
Subclass : Anhydrous phosphates
Crystal system : Orthorhombic
Chemistry : Li(Fe,Mn)PO₄
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Ferrosilite

Class : Silicates
Subclass : Inosilicates
Crystal system : Orthorhombic
Chemistry : FeSiO₃
Rarity : Common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Forsterite

Class : Silicates
Subclass : Nesosilicates
Crystal system : Orthorhombic
Chemistry : Mg₂SiO₄
Rarity : Very common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Fourmarierite

Class : Oxides and hydroxides
Subclass : Uranyl hydroxides
Crystal system : Orthorhombic
Chemistry : Pb(UO₂)₄O₃(OH)₄ 4H₂O
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Francevillite

Class : Phosphates, arsenates, vanadates
Subclass : Uranyl vanadates
Crystal system : Orthorhombic
Chemistry : (Ba,Pb)(UO₂)₂(VO₄)₂ 5H₂O
Rarity : Very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Frondelite

Class : Phosphates, arsenates, vanadates
Subclass : Anhydrous phosphates
Crystal system : Orthorhombic
Chemistry : MnFe₄(PO₄)₃(OH)₅
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Gedrite

Class : Silicates
Subclass : Inosilicates
Crystal system : Orthorhombic
Chemistry : (Mg,Fe)₅Al₂(Si₆Al₂)O₂₂(OH)₂
Rarity : Common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Glaucodot

Class : Sulfides and sulfosalts
Subclass : Sulfides
Crystal system : Orthorhombic
Chemistry : (Co,Fe)AsS
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Goethite

Class : Oxides and hydroxides
Subclass : Hydroxides and hydrates
Crystal system : Orthorhombique
Chemistry : FeO(OH)
Rarity : Very common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Goslarite

Class : Sulfates, chromates, molybdates
Subclass : Hydrated sulfates
Crystal system : Orthorhombic
Chemistry : ZnSO₄ 7H₂O
Rarity : Quite common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Grandidierite

Class : Silicates
Subclass : Nesosilicates
Crystal system : Orthorhombic
Chemistry : (Mg,Fe)Al₃(BO₃)(SiO₄)O₂
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Groutite

Class : Oxides and hydroxides
Subclass : Hydroxides
Crystal system : Orthorhombic
Chemistry : Mn³⁺O(OH)
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Guanajuatite

Class : Sulfides and sulfosalts
Subclass : Sulfides
Crystal system : Orthorhombic
Chemistry : Bi₂Se₃
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Guilleminite

Class : Oxides and hydroxides
Subclass : Uranyl selenites
Crystal system : Orthorhombic
Chemistry : Ba(UO₂)₃(SeO₃)₂O₂ 3H₂O
Rarity : Very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Hambergite

Class : Carbonates, nitrates, borates
Subclass : Borates
Crystal system : Orthorhombic
Chemistry : Be₂BO₃(OH)
Rarity : Rare to very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Hemimorphite

Class : Silicates
Subclass : Sorosilicates
Crystal system : Orthorhombic
Chemistry : Zn₄Si₂O₇(OH)₂ H₂O
Rarity : Common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Heterosite

Class : Phosphates, arsenates, vanadates
Subclass : Anhydrous phosphates
Crystal system : Orthorhombic
Chemistry : FePO₄
Rarity : Quite common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Holmquistite

Class : Silicates
Subclass : Inosilicates
Crystal system : Orthorhombic
Chemistry : Li₂Mg₃Al₂Si₈O₂₂(OH)₂
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Hopeite

Class : Phosphates, arsenates, vanadates
Subclass : Hydrated phosphates
Crystal system : Orthorhombic
Chemistry : Zn₃(PO₄)₂ 4H₂O
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Humite

Class : Silicates
Subclass : Nesosilicates
Crystal system : Orthorhombic
Chemistry : Mg₇(SiO₄)₃ (F,OH)₂
Rarity : Quite common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Hutchinsonite

Class : Sulfides and sulfosalts
Subclass : Sulfosalts
Crystal system : Orthorhombic
Chemistry : (Pb,Tl)₂As₅S₉
Rarity : Very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Hypersthene

Class : Silicates
Subclass : Inosilicates
Crystal system : Orthorhombic
Chemistry : (Mg,Fe)SiO₃
Rarity : Common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Ianthinite

Class : Oxides and hydroxides
Subclass : Uranyl hydroxides
Crystal system : Orthorhombic
Chemistry : UO₂5UO₃ 10H₂O
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Ilvaite

Class : Silicates
Subclass : Sorosilicates
Crystal system : Orthorhombic
Chemistry : CaFe₃OSi₂O₇(OH)
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Iriginite

Class : Sulfates, chromates, molybdates
Subclass : Uranyl molybdates
Crystal system : Orthorhombic
Chemistry : (UO₂)(Mo₂O₇) 3H₂O
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Kentrolite

Class : Silicates
Subclass : Sorosilicates
Crystal system : Orthorhombic
Chemistry : Pb₂Mn₂O₂Si₂O₇
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Klebelsbergite

Class : Sulfates, chromates, molybdates
Subclass : Anhydrous sulfates
Crystal system : Orthorhombic
Chemistry : Sb₄O₄(OH)₂(SO₄)
Rarity : Very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Kornerupine

Class : Silicates
Subclass : Nesosilicates
Crystal system : Orthorhombic
Chemistry : (Mg,Fe)₄Al₆(Si,Al,B)₅O₂₁(OH,F)
Rarity : Quite common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Krennerite

Class : Sulfides and sulfosalts
Subclass : Tellurides
Crystal system : Orthorhombic
Chemistry : Au₃AgTe₈
Rarity : Rare to very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Kryzhanovskite

Class : Phosphates, arsenates, vanadates
Subclass : Hydrated phosphates
Crystal system : Orthorhombic
Chemistry : Fe₂Mn(PO₄)₂(OH)₂ H₂O
Rarity : Rare to uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Langite

Class : Sulfates, chromates, molybdates
Subclass : Hydrated sulfates
Crystal system : Orthorhombic
Chemistry : Cu₄(SO₄)(OH)₆ 2H₂O
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Lanthanite

Class : Carbonates, nitrates, borates
Subclass : Hydrated carbonates
Crystal system : Orthorhombic
Chemistry : (La,Ce)₂(CO₃)₃ 8H₂O
Rarity : Rare to uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Laurionite

Class : Halides
Subclass : Oxychlorides
Crystal system : Orthorhombic
Chemistry : PbCl(OH)
Rarity : Very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Lautite

Class : Sulfides and sulfosalts
Subclass : Sulfides
Crystal system : Orthorhombic
Chemistry : CuAsS
Rarity : Very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Lavendulanite

Class : Phosphates, arsenates, vanadates
Subclass : Hydrated arsenates
Crystal system : Orthorhombic
Chemistry : NaCaCu₅(AsO₄)₄Cl 5H₂O
Rarity : Uncommon to fairly common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Lawsonite

Class : Silicates
Subclass : Sorosilicates
Crystal system : Orthorhombic
Chemistry : CaAl₂Si₂O₇(OH)₂ H₂O
Rarity : Common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Lepidocrocite

Class : Oxides and hydroxides
Subclass : Hydroxides and hydrates
Crystal system : Orthorhombic
Chemistry : FeO(OH)
Rarity : Common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Leucophanite

Class : Silicates
Subclass : Inosilicates
Crystal system : Orthorhombic
Chemistry : NaCaBeSi₂O₆F
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Libethenite

Class : Phosphates, arsenates, vanadates
Subclass : Anhydrous phosphates
Crystal system : Orthorhombic
Chemistry : Cu₂PO₄(OH)
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Liebigite

Class : Carbonates, nitrates, borates
Subclass : Uranyl carbonates
Crystal system : Orthorhombic
Chemistry : Ca₂(UO₂)(CO₃)₃ 11H₂O
Rarity : Rare to uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Lithiophilite

Class : Phosphates, arsenates, vanadates
Subclass : Anhydrous phosphates
Crystal system : Orthorhombic
Chemistry : LiMnPO₄
Rarity : Quite common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Löllingite

Class : Sulfides and sulfosalts
Subclass : Arsenides
Crystal system : Orthorhombic
Chemistry : FeAs₂
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Lorenzenite

Class : Silicates
Subclass : Inosilicates
Crystal system : Orthorhombic
Chemistry : Na₂Ti₂Si₂O₉
Rarity : Rare to very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Ludwigite

Class : Carbonates, nitrates, borates
Subclass : Borates
Crystal system : Orthorhombique
Chemistry : Mg₂FeBO₅
Rarity : Quite common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Mansfieldite

Class : Phosphates, arsenates, vanadates
Subclass : Hydrated arsenates
Crystal system : Orthorhombic
Chemistry : AlAsO₄ 2H₂O
Rarity : Rare to uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Marcasite

Class : Sulfides and sulfosalts
Subclass : Sulfides
Crystal system : Monoclinic
Chemistry : FeS₂
Rarity : Common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Marthozite

Class : Oxides and hydroxides
Subclass : Uranyl selenites
Crystal system : Orthorhombic
Chemistry : Cu(UO₂)₃(SeO₃)₃(OH)₂ 7H₂O
Rarity : Very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Massicot

Class : Oxides and hydroxides
Subclass : Oxides
Crystal system : Orthorhombic
Chemistry : PbO
Rarity : Uncommon to fairly common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Masuyite

Class : Oxides and hydroxides
Subclass : Uranyl hydroxides
Crystal system : Orthorhombic
Chemistry : Pb₃U₈O₂₇ 10H₂O
Rarity : Very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Melanotekite

Class : Silicates
Subclass : Sorosilicates
Crystal system : Orthorhombic
Chemistry : Pb₂Fe₂O₂Si₂O₇
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Mesolite

Class : Silicates
Subclass : Tectosilicates
Crystal system : Orthorhombic
Chemistry : Na₂Ca₂Al₆Si₉O₃₀ 8H₂O
Rarity : Common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Metastudtite

Class : Oxides and hydroxides
Subclass : Uranyl hydroxides
Crystal system : Orthorhombic
Chemistry : UO₄ 2H₂O
Rarity : Very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Metatyuyamunite

Class : Phosphates, arsenates, vanadates
Subclass : Uranyl vanadates
Crystal system : Orthorhombic
Chemistry : Ca(UO₂)₂(VO₄)₂ 3H₂O
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Minyulite

Class : Phosphates, arsenates, vanadates
Subclass : Hydrated phosphates
Crystal system : Orthorhombic
Chemistry : KAl₂(PO₄)₂(OH,F) 4H₂O
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Montesommaite

Class : Silicates
Subclass : Tectosilicates
Crystal system : Orthorhombic
Chemistry : (K,Na)₉Al₉Si₂₃O₆₄ 10H₂O
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Monticellite

Class : Silicates
Subclass : Nesosilicates
Crystal system : Orthorhombic
Chemistry : CaMgSiO₄
Rarity : Rare to uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Mordenite

Class : Silicates
Subclass : Tectosilicates
Crystal system : Orthorhombic
Chemistry : (Ca,Na₂,K₂)Al₂Si₁₀O₂₄ 7H₂O
Rarity : Common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Morenosite

Class : Sulfates, chromates, molybdates
Subclass : Hydrated sulfates
Crystal system : Triclinic
Chemistry : NiSO₄ 7H₂O
Rarity : Fairly common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Mottramite

Class : Phosphates, arsenates, vanadates
Subclass : Anhydrous vanadates
Crystal system : Orthorhombic
Chemistry : PbCu(VO₄)(OH)
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Mullite

Class : Silicates
Subclass : Nesosilicates
Crystal system : Orthorhombic
Chemistry : Al₆Si₂O₁₃
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Nadorite

Class : Halides
Subclass : Oxychlorides
Crystal system : Orthorhombic
Chemistry : PbSbO₂Cl
Rarity : Very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Natrolite

Class : Silicates
Subclass : Tectosilicates
Crystal system : Orthorhombic
Chemistry : Na₂Al₂Si₃O₁₀ 2H₂O
Rarity : Fairly common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Naumannite

Class : Sulfides and sulfosalts
Subclass : Selenides
Crystal system : Monoclinic
Chemistry : Ag₂Se
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Nepouite

Class : Silicates
Subclass : Phyllosilicates
Crystal system : Orthorhombic
Chemistry : Ni₃Si₂O₅(OH)₄
Rarity : Quite common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Niter

Class : Carbonates, nitrates, borates
Subclass : Nitrates
Crystal system : Orthorhombic
Chemistry : KNO₃
Rarity : Common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Norbergite

Class : Silicates
Subclass : Nesosilicates
Crystal system : Orthorhombic
Chemistry : Mg₃(SiO₄)(F,OH)₂
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Olivine

Class : Silicates
Subclass : Nesosilicates
Crystal system : Orthorhombic
Chemistry : X₂SiO₄
Rarity : Very common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Parnauite

Class : Phosphates, arsenates, vanadates
Subclass : Anhydrous arsenates
Crystal system : Orthorhombic
Chemistry : Cu₉(AsO₄)₂(SO₄)(OH)₁₀ 7H₂O
Rarity : Uncommon to rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Pentagonite

Class : Silicates
Subclass : Phyllosilicates
Crystal system : Orthorhombic
Chemistry : Ca(VO)Si₄O₁₀ 4H₂O
Rarity : Very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Perovskite

Class : Oxides and hydroxides
Subclass : Oxides
Crystal system : Orthorhombic
Chemistry : CaTiO₃
Rarity : Fairly common to rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Phosphoferrite

Class : Phosphates, arsenates, vanadates
Subclass : Hydrated phosphates
Crystal system : Orthorhombic
Chemistry : Fe₃(PO₄)₂ 3H₂O
Rarity : Rare to uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Phosphuranylite

Class : Phosphates, arsenates, vanadates
Subclass : Uranyl phosphates
Crystal system : Orthorhombic
Chemistry : KCa(H₃O)₃(UO₂)₇O₄(PO₄)₄ 8H₂O
Rarity : Quite common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Phurcalite

Class : Phosphates, arsenates, vanadates
Subclass : Uranyl phosphates
Crystal system : Orthorhombic
Chemistry : Ca₂(UO₂)₃O₂(PO₄)₂ 7H₂O
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Plancheite

Class : Silicates
Subclass : Inosilicates
Crystal system : Orthorhombic
Chemistry : Cu₈Si₈O₂₂(OH)₄ H₂O
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Prehnite

Class : Silicates
Subclass : Inosilicates
Crystal system : Orthorhombic
Chemistry : Ca₂Al₂Si₃O₁₀(OH)₂
Rarity : Quite common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Pseudobrookite

Class : Oxides and hydroxides
Subclass : Oxides
Crystal system : Orthorhombic
Chemistry : Fe₂TiO₅
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Pucherite

Class : Phosphates, arsenates, vanadates
Subclass : Anhydrous vanadates
Crystal system : Orthorhombic
Chemistry : BiVO₄
Rarity : Rare to very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Purpurite

Class : Phosphates, arsenates, vanadates
Subclass : Anhydrous phosphates
Crystal system : Orthorhombic
Chemistry : MnPO₄
Rarity : Quite common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Pyroxen

Class : Silicates
Subclass : Inosilicates
Crystal system : Orthorhombic or monoclinic
Chemistry : XYSi₂O₆
Rarity : Very common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Raite

Class : Silicates
Subclass : Phyllosilicates
Crystal system : Orthorhombic
Chemistry : Na₃Mn₃Ti_0,25Si₈O₂₀(OH)₂ 10H₂O
Rarity : Very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Rammelsbergite

Class : Sulfides and sulfosalts
Subclass : Arsenides
Crystal system : Orthorhombic
Chemistry : NiAs₂
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Ramsdellite

Class : Oxides and hydroxides
Subclass : Oxides
Crystal system : Orthorhombic
Chemistry : MnO₂
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Reddingite

Class : Phosphates, arsenates, vanadates
Subclass : Hydrated phosphates
Crystal system : Orthorhombic
Chemistry : Mn₃(PO₄)₂ 3H₂O
Rarity : Rare to very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Renardite

Class : Phosphates, arsenates, vanadates
Subclass : Uranyl phosphates
Crystal system : Orthorhombic
Chemistry : Pb(UO₂)₄(PO₄)₂(OH)₄ 7H₂O
Rarity : Rare to very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Rhomboclase

Class : Sulfates, chromates, molybdates
Subclass : Hydrated sulfates
Crystal system : Orthorhombic
Chemistry : HFe(SO₄)₂ 4H₂O
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Rockbridgeite

Class : Phosphates, arsenates, vanadates
Subclass : Anhydrous phosphates
Crystal system : Orthorhombic
Chemistry : MnFe₄(PO₄)₃(OH)₅
Rarity : Fairly common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Rutherfordine

Class : Carbonates, nitrates, borates
Subclass : Uranyl carbonates
Crystal system : Orthorhombic
Chemistry : UO₂CO₃
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Safflorite

Class : Sulfides and sulfosalts
Subclass : Arsenides
Crystal system : Orthorhombic
Chemistry : CoAs₂
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Sampleite

Class : Phosphates, arsenates, vanadates
Subclass : Hydrated phosphates
Crystal system : Orthorhombic
Chemistry : NaCaCu₅(PO₄)₄Cl 5H₂O
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Schoepite

Class : Oxides and hydroxides
Subclass : Uranyl hydroxides
Crystal system : Orthorhombic
Chemistry : (UO₂)₄O(OH)₆ 6H₂O
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Scholzite

Class : Phosphates, arsenates, vanadates
Subclass : Hydrated phosphates
Crystal system : Orthorhombic
Chemistry : CaZn₂(PO₄)₂ 2H₂O
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Scorodite

Class : Phosphates, arsenates, vanadates
Subclass : Hydrated arsenates
Crystal system : Orthorhombic
Chemistry : FeAsO₄ 2H₂O
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Seligmannite

Class : Sulfides and Sulfosalts
Subclass : Sulfosalts
Crystal system : Orthorhombic
Chemistry : PbCuAsS₃
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Senegalite

Class : Phosphates, arsenates, vanadates
Subclass : Hydrated phosphates
Crystal system : Orthorhombic
Chemistry : Al₂(PO₄)(OH)₃ H₂O
Rarity : Very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Sepiolite

Class : Mg₄Si₆O₁₅(OH)₂ 6H₂O
Subclass : Phyllosilicates
Crystal system : Orthorhombic
Chemistry : Mg₄Si₆O₁₅(OH)₂ 6H₂O
Rarity : Fairly common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Shattuckite

Class : Silicates
Subclass : Inosilicates
Crystal system : Orthorhombic
Chemistry : Cu₅(SiO₃)₄(OH)₂
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Shortite

Class : Carbonates, nitrates, borates
Subclass : Anhydrous carbonates
Crystal system : Orthorhombic
Chemistry : Na₂Ca₂(CO₃)₃
Rarity : Very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Sicklerite

Class : Phosphates, arsenates, vanadates
Subclass : Anhydrous phosphates
Crystal system : Orthorhombic
Chemistry : Li(Mn,Fe)PO₄
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Sillimanite

Class : Silicates
Subclass : Nesosilicates
Crystal system : Orthorhombic
Chemistry : Al₂SiO₅
Rarity : Common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Soddyite

Class : Silicates
Subclass : Nesosilicates
Crystal system : Orthorhombic
Chemistry : (UO₂)₂SiO₄ 2H₂O
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Sulphur

Class : Elements
Subclass : Non-metals
Crystal system : Orthorhombic
Chemistry : S
Rarity : Quite common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Stellerite

Class : Silicates
Subclass : Tectosilicates
Crystal system : Orthorhombic
Chemistry : CaAl₂Si₇O₁₈ 7H₂O
Rarity : Rare to uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Stephanite

Class : Sulfides and sulfosalts
Subclass : Sulfosalts
Crystal system : Orthorhombic
Chemistry : Ag₅SbS₄
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Stibnite

Class : Sulfides and sulfosalts
Subclass : Sulfides
Crystal system : Orthorhombic
Chemistry : Sb₂S₃
Rarity : Fairly common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Stibiotantalite

Class : Oxides and hydroxides
Subclass : Oxides
Crystal system : Orthorhombic
Chemistry : SbTaO₄
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Strengite

Class : Phosphates, arsenates, vanadates
Subclass : Hydrated phosphates
Crystal system : Orthorhombic
Chemistry : FePO₄ 2H₂O
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Stromeyerite

Class : Sulfides and sulfosalts
Subclass : Sulfides
Crystal system : Orthorhombic
Chemistry : AgCuS
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Strontianite

Class : Carbonates, nitrates, borates
Subclass : Anhydrous carbonates
Crystal system : Orthorhombic
Chemistry : SrCO₃
Rarity : Fairly common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Struvite

Class : Phosphates, arsenates, vanadates
Subclass : Hydrated phosphates
Crystal system : Orthorhombic
Chemistry : (NH₄)MgPO₄ 6H₂O
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Tantalite

Class : Oxides and hydroxides
Subclass : Oxides
Crystal system : Orthorhombic
Chemistry : (Fe²⁺,Mn²⁺,Mg²⁺)(Ta,Nb)₂O₆
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Tanzanite

Class : Silicates
Subclass : Sorosilicates
Crystal system : Orthorhombic
Chemistry : Ca₂Al₃(SiO₄)₃(OH)
Rarity : Very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Teallite

Class : Sulfides and sulfosalts
Subclass : Sulfides
Crystal system : Orthorhombic
Chemistry : PbSnS₂
Rarity : Very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Tellurite

Class : Oxides and hydroxides
Subclass : Oxides
Crystal system : Orthorhombique
Chemistry : TeO₂
Rarity : Very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Tephroite

Class : Silicates
Subclass : Nesosilicates
Crystal system : Orthorhombic
Chemistry : Mn₂SiO₄
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Thenardite

Class : Sulfates, chromates, molybdates
Subclass : Anhydrous sulfates
Crystal system : Orthorhombic
Chemistry : Na₂SO₄
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Thomsonite

Class : Silicates
Subclass : Tectosilicates
Crystal system : Orthorhombic
Chemistry : NaCa₂Al₅Si₅O₂₀ 6H₂O
Rarity : Fairly common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Thulite

Class : Silicates
Subclass : Sorosilicates
Crystal system : Orthorhombic
Chemistry : Ca₂Al₃(SiO₄)₃(OH)
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Topaz

Class : Silicates
Subclass : Nesosilicates
Crystal system : Orthorhombic
Chemistry : Al₂SiO₄(F,OH)₂
Rarity : Common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Tridymite

Class : Silicates
Subclass : Tectosilicates
Crystal system : Orthorhombic
Chemistry : SiO₂
Rarity : Uncommon to fairly common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Triphylite

Class : Phosphates, arsenates, vanadates
Subclass : Anhydrous phosphates
Crystal system : Orthorhombic
Chemistry : LiFePO₄
Rarity : Fairly common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Tungstite

Class : Oxides and hydroxides
Subclass : Hydroxides and hydrates
Crystal system : Orthorhombic
Chemistry : WO₃ H₂O
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Tyrolite

Class : Phosphates, arsenates, vanadates
Subclass : Hydrated arsenates
Crystal system : Orthorhombic
Chemistry : CaCu₅(AsO₄)₂(CO₃)(OH)₄ 6H₂O
Rarity : Uncommon to rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Tyuyamunite

Class : Phosphates, arsenates, vanadates
Subclass : Uranyl vanadates
Crystal system : Orthorhombic
Chemistry : Ca(UO₂)₂(VO₄)₂ 5-8H₂O
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Valentinite

Class : Oxides and hydroxides
Subclass : Oxides
Crystal system : Orthorhombic
Chemistry : Sb₂O₃
Rarity : Fairly common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Variscite

Class : Phosphates, arsenates, vanadates
Subclass : Hydrated phosphates
Crystal system : Orthorhombic
Chemistry : AlPO₄ 2H₂O
Rarity : Fairly common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Vonsenite

Class : Carbonates, nitrates, borates
Subclass : Borates
Crystal system : Orthorhombic
Chemistry : Fe₃BO₅
Rarity : Rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Wavellite

Class : Phosphates, arsenates, vanadates
Subclass : Hydrated phosphates
Crystal system : Tetragonal
Chemistry : Al₃(PO₄)₂(OH,F)₃ 5H₂O
Rarity : Uncommon

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Whiterite

Class : Carbonates, nitrates, borates
Subclass : Anhydrous carbonates
Crystal system : Orthorhombic
Chemistry : BaCO₃
Rarity : Rare to very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Wittichenite

Class : Sulfides and sulfosalts
Subclass : Sulfosalts
Crystal system : Orthorhombic
Chemistry : Cu₃BiS₃
Rarity : Rare to very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Wyartite

Class : Carbonates, nitrates, borates
Subclass : Uranyl carbonates
Crystal system : Orthorhombic
Chemistry : Ca₃U(UO₂)₆(CO₃)₂(OH)₁₈ 4H₂O
Rarity : Very rare

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Zippeite

Class : Sulfates, chromates, molybdates
Subclass : Uranyl sulfate
Crystal system : Orthorhombic
Chemistry : K(UO₂)₂SO₄(OH)₃ H₂O
Rarity : Fairly common

Size : µm / mm / cm / dm / m

Click on the photo for more information

.

Zoisite

Class : Silicates
Subclass : Sorosilicates
Crystal system : Orthorhombic
Chemistry : Ca₂Al₃(SiO₄)₃(OH)
Rarity : Fairly common

Size : µm / mm / cm / dm / m

Click on the photo for more information