Encyclopedia - Trigonal

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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 TRIGONAL SYSTEM

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Afghanite

Class : Silicates
Subclass : Tectosilicates
Crystal system : Trigonal
Chemistry : (Na,Ca,K)₈(AlSiO₄)₆(SO₄,Cl₂,CO₃)₃ 0,5H₂O
Rarity : Rare

Size : µm / mm / cm / dm / m

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Agate

Class : Silicates
Subclass : Tectosilicates
Crystal system : Trigonal
Chemistry : SiO₂
Rarity : Very common

Size : µm / mm / cm / dm / m

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Alunite

Class : Sulphates, chromates, molybdates
Subclass : Anhydrous sulphates
Crystal system : Trigonal
Chemistry : KAl₃(SO₄)₂(OH)₆
Rarity : Fairly common

Size : µm / mm / cm / dm / m

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Amethyst

Class : Silicates
Subclass : Tectosilicates
Crystal system : Trigonal
Chemistry : SiO₂
Rarity : Quite common

Size : µm / mm / cm / dm / m

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Ametrine

Class : Silicates
Subclass : Tectosilicates
Crystal system : Trigonal
Chemistry : SiO₂
Rarity : Rare

Size : µm / mm / cm / dm / m

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Andersonite

Class : Carbonates, Nitrates, Borates
Subclass : Uranyl carbonates
Crystal system : Trigonal
Chemistry : Na₂Ca(UO₂)(CO₃)₃ 6H₂O
Rarity : Rare

Size : µm / mm / cm / dm / m

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Ankerite

Class : Carbonates, Nitrates, Borates
Subclass : Anhydrous carbonates
Crystal system : Trigonal
Chemistry : CaFe(CO₃)₂
Rarity : Very common

Size : µm / mm / cm / dm / m

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Antimony

Class : Elements
Subclass : Metalloids
Crystal system : Trigonal
Chemistry : Sb
Rarity : Rare

Size : µm / mm / cm / dm / m

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Arsenic

Class : Elements
Subclass : Metalloids
Crystal system : Trigonal
Chemistry : As
Rarity : Uncommon

Size : µm / mm / cm / dm / m

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Asbolane

Class : Oxides and hydroxides
Subclass : Hydroxides and hydrates
Crystal system : Trigonal
Chemistry : (Co,Ni)_xMn(O,OH)₄ nH₂O
Rarity : Rare

Size : µm / mm / cm / dm / m

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Beudantite

Class : Sulphates, chromates, molybdates
Subclass : Anhydrous sulphates
Crystal system : Trigonal
Chemistry : PbFe₃(AsO₄)(SO₄)(OH)₆
Rarity : Rare

Size : µm / mm / cm / dm / m

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Bismuth

Class : Elements
Subclass : Metalloids
Crystal system : Trigonal
Chemistry : Bi
Rarity : Fairly common

Size : µm / mm / cm / dm / m

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Brucite

Class : Oxides and hydroxides
Subclass : Hydroxides
Crystal system : Trigonal
Chemistry : Mg(OH)₂
Rarity : Quite common

Size : µm / mm / cm / dm / m

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Buergerite

Class : Silicates
Subclass : Cyclosilicates
Crystal system : Trigonal
Chemistry : NaFe₃Al₆(BO₃)₃Si₆O₁₈(O,F,OH)₄
Rarity : Very rare

Size : µm / mm / cm / dm / m

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Chalcedony

Class : Silicates
Subclass : Tectosilicates
Crystal system : Trigonal
Chemistry : SiO₂
Rarity : Very common

Size : µm / mm / cm / dm / m

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Calcite

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

Size : µm / mm / cm / dm / m

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Cerite

Class : Silicates
Subclass : Nesosilicates
Crystal system : Trigonal
Chemistry : Ce₉(Mg,Fe)(SiO₄)₆(SiO₃OH)(OH)₃
Rarity : Uncommon

Size : µm / mm / cm / dm / m

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Chalcophanite

Class : Oxides and hydroxides
Subclass : Hydroxides and hydrates
Crystal system : Trigonal
Chemistry : ZnMn₃O₇ 3H₂O
Rarity : Quite common

Size : µm / mm / cm / dm / m

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Chalcophyllite

Class : Phosphates, arsenates, vanadates
Subclass : Hydrated arsenates
Crystal system : Trigonal
Chemistry : Cu₁₈Al₂(AsO₄)₄(SO₄)₃(OH)₂₄ 36H₂O
Rarity : Uncommon to rare

Size : µm / mm / cm / dm / m

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Cinnabar

Class : Sulfides and sulfosalts
Subclass : Sulfides
Crystal system : Trigonal
Chemistry : HgS
Rarity : Quite common

Size : µm / mm / cm / dm / m

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Citrine

Class : Silicates
Subclass : Tectosilicates
Crystal system : Trigonal
Chemistry : SiO₂
Rarity : Very rare

Size : µm / mm / cm / dm / m

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Coquimbite

Class : Sulfates, chromates, molybdates
Subclass : Hydrated sulfates
Crystal system : Trigonal
Chemistry : Fe₂(SO₄)₃ 9H₂O
Rarity : Rare to uncommon

Size : µm / mm / cm / dm / m

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Corundum

Class : Oxides and hydroxides
Subclass : Oxides
Crystal system : Trigonal
Chemistry : Al₂O₃
Rarity : Common

Size : µm / mm / cm / dm / m

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Corkite

Class : Phosphates, arsenates, vanadates
Subclass : Anhydrous phosphates
Crystal system : Trigonal
Chemistry : PbFe₃(PO₄)(SO₄)(OH)₆
Rarity : Uncommon

Size : µm / mm / cm / dm / m

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Crandallite

Class : Phosphates, arsenates, vanadates
Subclass : Hydrated phosphates
Crystal system : Trigonal
Chemistry : CaAl₃(PO₄)₂(OH)₅ H₂O
Rarity : Common

Size : µm / mm / cm / dm / m

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Crichtonite

Class : Oxides and hydroxides
Subclass : Oxides
Crystal system : Trigonal
Chemistry : (Sr,La,Ce,Y)(Ti,Fe,Mn)₂₁O₃₈
Rarity : Rare

Size : µm / mm / cm / dm / m

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Cronstedtite

Class : Silicates
Subclass : Phyllosilicates
Crystal system : Trigonal
Chemistry : Fe₃(SiFe)O₅(OH)₄
Rarity : Uncommon

Size : µm / mm / cm / dm / m

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Delafossite

Class : Oxides and hydroxides
Subclass : Oxides
Crystal system : Trigonal
Chemistry : CuFeO₂
Rarity : Rare

Size : µm / mm / cm / dm / m

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Digenite

Class : Sulfides and sulfosalts
Subclass : Sulfides
Crystal system : Trigonal
Chemistry : Cu₉S₅
Rarity : Uncommon

Size : µm / mm / cm / dm / m

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Dioptase

Class : Silicates
Subclass : Cyclosilicates
Crystal system : Trigonal
Chemistry : CuSiO₃ H₂O
Rarity : Rare

Size : µm / mm / cm / dm / m

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Dolomite

Class : Carbonates, nitrates, borates
Subclass : Anhydrous carbonates
Crystal system : Trigonal
Chemistry : CaMg(CO₃)₂
Rarity : Very common

Size : µm / mm / cm / dm / m

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Dravite

Class : Silicates
Subclass : Cyclosilicates
Crystal system : Trigonal
Chemistry : NaMg₃Al₆(BO₃)₃Si₆O₁₈(OH)₄
Rarity : Common

Size : µm / mm / cm / dm / m

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Dussertite

Class : Phosphates, arsenates, vanadates
Subclass : Anhydrous arsenates
Crystal system : Trigonal
Chemistry : Ba(Fe,Sb)₃(AsO₄)₂(OH,H₂O)
Rarity : Very rare

Size : µm / mm / cm / dm / m

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Eifelite

Class : Silicates
Subclass : Cyclosilicates
Crystal system : Trigonal
Chemistry : KNa₃Mg₄Si₁₂O₃₀
Rarity : Very rare

Size : µm / mm / cm / dm / m

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Elbaite

Class : Silicates
Subclass : Cyclosilicates
Crystal system : Trigonal
Chemistry : Na(Al,Li)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄
Rarity : Uncommon

Size : µm / mm / cm / dm / m

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Eskolaite

Class : Oxides and hydroxides
Subclass : Oxides
Crystal system : Trigonal
Chemistry : Cr₂O₃
Rarity : Very rare

Size : µm / mm / cm / dm / m

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Ettringite

Class : Sulphates, chromates, molybdates
Subclass : Hydrated sulphates
Crystal system : Trigonal
Chemistry : Ca₆Al₂(SO₄)₃(OH)₁₂ 26H₂O
Rarity : Rare

Size : µm / mm / cm / dm / m

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Eucryptite

Class : Silicates
Subclass : Nesosilicates
Crystal system : Trigonal
Chemistry : LiAlSiO₄
Rarity : Rare

Size : µm / mm / cm / dm / m

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Eudialyte

Class : Silicates
Subclass : Cyclosilicates
Crystal system : Trigonal
Chemistry : Na₄(Ca,Ce,Fe)₃ZrSi₆O₁₇ (OH,Cl)₂
Rarity : Rare

Size : µm / mm / cm / dm / m

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Ferrinatrite

Class : Sulfates, chromates, molybdates
Subclass : Hydrated sulfates
Crystal system : Trigonal
Chemistry : Na₃Fe(SO₄)₃ 3H₂O
Rarity : Uncommon

Size : µm / mm / cm / dm / m

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Fibroferrite

Class : Sulfates, chromates, molybdates
Subclass : Hydrated sulfates
Crystal system : Trigonal
Chemistry : Fe(SO₄)(OH) 5H₂O
Rarity : Rare to uncommon

Size : µm / mm / cm / dm / m

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Gaspeite

Class : Carbonates, nitrates, borates
Subclass : Anhydrous carbonates
Crystal system : Trigonal
Chemistry : (Ni,Mg,Fe)CO₃
Rarity : Very rare

Size : µm / mm / cm / dm / m

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Geikielite

Class : Oxides and hydroxides
Subclass : Oxides
Crystal system : Trigonal
Chemistry : MgTiO₃
Rarity : Rare to uncommon

Size : µm / mm / cm / dm / m

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Goyazite

Class : Phosphates, arsenates, vanadates
Subclass : Hydrated phosphates
Crystal system : Trigonal
Chemistry : SrAl₃(PO₄)₂(OH)₅ H₂O
Rarity : Uncommon

Size : µm / mm / cm / dm / m

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Gratonite

Class : Sulfides and sulfosalts
Subclass : Sulfosalts
Crystal system : Trigonal
Chemistry : Pb₉As₄S₁₅
Rarity : Very rare

Size : µm / mm / cm / dm / m

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Heazlewoodite

Class : Sulfides and sulfosalts
Subclass : Sulfides
Crystal system : Trigonal
Chemistry : Ni₃S₂
Rarity : Rare

Size : µm / mm / cm / dm / m

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Hematite

Class : Oxides and hydroxides
Subclass : Oxides
Crystal system : Trigonal
Chemistry : Fe₂O₃
Rarity : Very common

Size : µm / mm / cm / dm / m

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Hydrocerussite

Class : Carbonates, nitrates, borates
Subclass : Hydrated carbonates
Crystal system : Trigonal
Chemistry : Pb₃(CO₃)₂(OH)₂
Rarity : Uncommon

Size : µm / mm / cm / dm / m

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Ilmenite

Class : Oxides and hydroxides
Subclass : Oxides
Crystal system : Trigonal
Chemistry : FeTiO₃
Rarity : Very common

Size : µm / mm / cm / dm / m

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Jarosite

Class : Sulfates, chromates, molybdates
Subclass : Anhydrous sulfates
Crystal system : Trigonal
Chemistry : KFe₃(SO₄)₂(OH)₆
Rarity : Common

Size : µm / mm / cm / dm / m

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Karelianite

Class : Oxides and hydroxides
Subclass : Oxides
Crystal system : Trigonal
Chemistry : V₂O₃
Rarity : Very rare

Size : µm / mm / cm / dm / m

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Kutnahorite

Class : Carbonates, nitrates, borates
Subclass : Anhydrous carbonates
Crystal system : Trigonal
Chemistry : CaMn(CO₃)₂
Rarity : Rare

Size : µm / mm / cm / dm / m

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Leifite

Class : Silicates
Subclass : Tectosilicates
Crystal system : Trigonal
Chemistry : Na₂(Si,Al,Be)₇(O,OH,F)₁₄
Rarity : Very rare

Size : µm / mm / cm / dm / m

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Lévyne

Class : Silicates
Subclass : Tectosilicates
Crystal system : Trigonal
Chemistry : (Ca,Na₂,K₂)Al₂Si₄O₁₂ 6H₂O
Rarity : Uncommon

Size : µm / mm / cm / dm / m

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Liddicoatite

Class : Silicates
Subclass : Cyclosilicates
Crystal system : Trigonal
Chemistry : Ca(Li,Al)₃Al₆(BO₃)₃Si₆O₁₈(O,OH,F)₄
Rarity : Very rare

Size : µm / mm / cm / dm / m

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Lithiophorite

Class : Oxides and hydroxides
Subclass : Hydroxides and hydrates
Crystal system : Trigonal
Chemistry : (Al,Li)MnO₂(OH)₂
Rarity : Quite common

Size : µm / mm / cm / dm / m

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Magnesite

Class : Carbonates, nitrates, borates
Subclass : Anhydrous carbonates
Crystal system : Trigonal
Chemistry : MgCO₃
Rarity : Common

Size : µm / mm / cm / dm / m

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Mercury

Class : Elements
Subclass : Metals
Crystal system : Trigonal
Chemistry : Hg
Rarity : Rare

Size : µm / mm / cm / dm / m

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Millerite

Class : Sulfides and sulfosalts
Subclass : Sulfides
Crystal system : Trigonal
Chemistry : NiS
Rarity : Uncommon

Size : µm / mm / cm / dm / m

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Namuwite

Class : Sulfates, chromates, molybdates
Subclass : Hydrated sulfates
Crystal system : Trigonal
Chemistry : (Zn,Cu)₄SO₄(OH)₆ 4H₂O
Rarity : Rare

Size : µm / mm / cm / dm / m

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Natroalunite

Class : Sulfates, chromates, molybdates
Subclass : Anhydrous sulfates
Crystal system : Trigonal
Chemistry : NaAl₃(SO₄)₂(OH)₆
Rarity : Rare to uncommon

Size : µm / mm / cm / dm / m

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Natrojarosite

Class : Sulfates, chromates, molybdates
Subclass : Anhydrous sulfates
Crystal system : Trigonal
Chemistry : NaFe₃(SO₄)₂(OH)₆
Rarity : Rare to uncommon

Size : µm / mm / cm / dm / m

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Nitratine

Class : Carbonates, nitrates, borates
Subclass : Nitrates
Crystal system : Trigonal
Chemistry : NaNO₃
Rarity : Quite common

Size : µm / mm / cm / dm / m

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Otavite

Class : Carbonates, nitrates, borates
Subclass : Anhydrous carbonates
Crystal system : Trigonal
Chemistry : CdCO₃
Rarity : Rare to very rare

Size : µm / mm / cm / dm / m

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Paratacamite

Class : Halides
Subclass : Oxychlorides
Crystal system : Trigonal
Chemistry : Cu₂Cl(OH)₃
Rarity : Rare

Size : µm / mm / cm / dm / m

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Parisite

Class : Carbonates, nitrates, borates
Subclass : Anhydrous carbonates
Crystal system : Trigonal
Chemistry : Ca(Ce,La,Nd)₂(CO₃)₃F₂
Rarity : Rare

Size : µm / mm / cm / dm / m

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Pearceite

Class : Sulfides and sulfosalts
Subclass : Sulfosalts
Crystal system : Trigonal
Chemistry : Ag₁₆As₂S₁₁
Rarity : Uncommon

Size : µm / mm / cm / dm / m

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Pezzottaite

Class : Silicates
Subclass : Cyclosilicates
Crystal system : Trigonal
Chemistry : Cs(Be₂Li)Al₂(Si₆O₁₈)
Rarity : Very rare

Size : µm / mm / cm / dm / m

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Phenakite

Class : Silicates
Subclass : Nesosilicates
Crystal system : Trigonal
Chemistry : Be₂SiO₄
Rarity : Uncommon

Size : µm / mm / cm / dm / m

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Philipsbornite

Class : Phosphates, arsenates, vanadates
Subclass : Hydrated arsenates
Crystal system : Trigonal
Chemistry : PbAl₃(AsO₄)₂(OH)₅ H₂O
Rarity : Very rare

Size : µm / mm / cm / dm / m

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Pietersite

Class : Silicates
Subclass : Tectosilicates
Crystal system : Trigonal
Chemistry : SiO₂
Rarity : Rare

Size : µm / mm / cm / dm / m

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Plumbogummite

Class : Phosphates, arsenates, vanadates
Subclass : Hydrated phosphates
Crystal system : Trigonal
Chemistry : PbAl₃(PO₄)₂(OH)₅ H₂O
Rarity : Uncommon

Size : µm / mm / cm / dm / m

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Plumbojarosite

Class : Sulfates, chromates, molybdates
Subclass : Anhydrous sulfates
Crystal system : Trigonal
Chemistry : PbFe₆(SO₄)₄(OH)₁₂
Rarity : Quite common

Size : µm / mm / cm / dm / m

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Portlandite

Class : Oxides and hydroxides
Subclass : Hydroxides and hydrates
Crystal system : Trigonal
Chemistry : Ca(OH)₂
Rarity : Rare to uncommon

Size : µm / mm / cm / dm / m

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Proustite

Class : Sulfides and sulfosalts
Subclass : Sulfosalts
Crystal system : Trigonal
Chemistry : Ag₃AsS₃
Rarity : Uncommon

Size : µm / mm / cm / dm / m

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Pyrargyrite

Class : Sulfides and sulfosalts
Subclass : Sulfosalts
Crystal system : Trigonal
Chemistry : Ag₃SbS₃
Rarity : Uncommon

Size : µm / mm / cm / dm / m

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Pyrochroite

Class : Oxides and hydroxides
Subclass : Hydroxides and hydrates
Crystal system : Trigonal
Chemistry : Mn(OH)₂
Rarity : Uncommon

Size : µm / mm / cm / dm / m

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Pyrophanite

Class : Oxides and hydroxides
Subclass : Oxides
Crystal system : Trigonal
Chemistry : MnTiO₃
Rarity : Fairly common

Size : µm / mm / cm / dm / m

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Pyrosmalite

Class : Silicates
Subclass : Phyllosilicates
Crystal system : Trigonal
Chemistry : (Fe,Mn)₈Si₆O₁₅(OH,Cl)₁₀
Rarity : Uncommon

Size : µm / mm / cm / dm / m

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Quartz

Class : Silicates
Subclass : Tectosilicates
Crystal system : Trigonal
Chemistry : SiO₂
Rarity : Very common

Size : µm / mm / cm / dm / m

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Rhodochrosite

Class : Carbonates, nitrates, borates
Subclass : Anhydrous carbonates
Crystal system : Trigonal
Chemistry : MnCO₃
Rarity : Common

Size : µm / mm / cm / dm / m

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Rubellite

Class : Silicates
Subclass : Cyclosilicates
Crystal system : Trigonal
Chemistry : Na(Al,Li)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄
Rarity : Uncommon

Size : µm / mm / cm / dm / m

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Ruby

Class : Oxides and hydroxides
Subclass : Oxides
Crystal system : Trigonal
Chemistry : Al₂O₃
Rarity : Rare

Size : µm / mm / cm / dm / m

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Sapphire

Class : Oxides and hydroxides
Subclass : Oxides
Crystal system : Trigonal
Chemistry : Al₂O₃
Rarity : Rare

Size : µm / mm / cm / dm / m

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Schorl

Class : Silicates
Subclass : Cyclosilicates
Crystal system : Trigonal
Chemistry : NaFe₃Al₆(BO₃)₃Si₆O₁₈(O,F,OH)₄
Rarity : Very common

Size : µm / mm / cm / dm / m

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Schulenbergite

Class : Sulfates, chromates, molybdates
Subclass : Hydrated sulfates
Crystal system : Trigonal
Chemistry : (Cu,Zn)₇(SO₄,CO₃)₂(OH)₁₀ 3H₂O
Rarity : Rare

Size : µm / mm / cm / dm / m

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Selenium

Class : Elements
Subclass : Non-metals
Crystal system : Trigonal
Chemistry : Se
Rarity : Rare

Size : µm / mm / cm / dm / m

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Shigaite

Class : Sulfates, chromates, molybdates
Subclass : Hydrated sulfates
Crystal system : Trigonal
Chemistry : Mn₆Al₃(OH)₁₈Na(H₂O)₆(SO₄)₂ 6H₂O
Rarity : Very rare

Size : µm / mm / cm / dm / m

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Shigaïte de N'Chwaning Mine, Afrique du Sud

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Shijiangshanite

Class : Silicates
Subclass : Inosilicates
Crystal system : Trigonal
Chemistry : Pb₃CaAl(Si₅O₁₄)(OH)₃ 3H₂O
Rarity : Very rare

Size : µm / mm / cm / dm / m

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Siderite

Class : Carbonates, nitrates, borates
Subclass : Anhydrous carbonates
Crystal system : Trigonal
Chemistry : FeCO₃
Rarity : Very common

Size : µm / mm / cm / dm / m

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Slavikite

Class : Sulfates, chromates, molybdates
Subclass : Hydrated sulfates
Crystal system : Trigonal
Chemistry : NaMg₂Fe₅(SO₄)₇(OH)₆ 33H₂O
Rarity : Rare

Size : µm / mm / cm / dm / m

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Infos

Smithsonite

Class : Carbonates, nitrates, borates
Subclass : Anhydrous carbonates
Crystal system : Trigonal
Chemistry : ZnCO₃
Rarity : Rare

Size : µm / mm / cm / dm / m

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Infos

Spangolite

Class : Sulfates, chromates, molybdates
Subclass : Hydrated sulfates
Crystal system : Trigonal
Chemistry : Cu₆AlSO₄(OH)₁₂Cl 3H₂O
Rarity : Fairly common

Size : µm / mm / cm / dm / m

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Infos

Spherocobaltite

Class : Carbonates, nitrates, borates
Subclass : Anhydrous carbonates
Crystal system : Trigonal
Chemistry : CoCO₃
Rarity : Rare

Size : µm / mm / cm / dm / m

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Infos

Steenstrupine

Class : Silicates
Subclass : Sorosilicates
Crystal system : Trigonal
Chemistry : Na₁₄Ce₆Mn₂Fe₂Zr(Si₆O₁₈)₂(PO₄)₇(OH)₂ 3H₂O
Rarity : Very rare

Size : µm / mm / cm / dm / m

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Infos

Stichtite

Class : Carbonates, nitrates, borates
Subclass : Hydrated carbonates
Crystal system : Trigonal
Chemistry : Mg₆Cr₂(CO₃)(OH)₁₆ 4H₂O
Rarity : Uncommon to rare

Size : µm / mm / cm / dm / m

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Infos

Sturmanite

Class : Sulfates, chromates, molybdates
Subclass : Hydrated sulfates
Crystal system : Trigonal
Chemistry : Ca₆Fe₂(SO₄)₂[B(OH)₄](OH)₁₂ 25H₂O
Rarity : Very rare

Size : µm / mm / cm / dm / m

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Infos

Svanbergite

Class : Sulfates, chromates, molybdates
Subclass : Anhydrous sulfates
Crystal system : Trigonal
Chemistry : SrAl₃(PO₄)(SO₄)(OH)₆
Rarity : Uncommon

Size : µm / mm / cm / dm / m

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Infos

Takovite

Class : Carbonates, nitrates, borates
Subclass : Hydrated carbonates
Crystal system : Trigonal
Chemistry : Ni₆Al₂(CO₃)(OH)₁₆ 4H₂O
Rarity : Rare to very rare

Size : µm / mm / cm / dm / m

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Infos

Tellurium

Class : Elements
Subclass : Non-metals
Crystal system : Trigonal
Chemistry : Te
Rarity : Rare

Size : µm / mm / cm / dm / m

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Infos

Tetradymite

Class : Sulfides and sulfosalts
Subclass : Tellurides
Crystal system : Trigonal
Chemistry : Bi₂Te₂S
Rarity : Uncommon

Size : µm / mm / cm / dm / m

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Infos

Tincalconite

Class : Carbonates, nitrates, borates
Subclass : Borates
Crystal system : Trigonal
Chemistry : Na₂B₄O₅(OH)₄ 3H₂O
Rarity : Uncommon

Size : µm / mm / cm / dm / m

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Infos

Tourmaline

Class : Silicates
Subclass : Cyclosilicates
Crystal system : Trigonal
Chemistry : WX₃Y₆(BO₃)Si₆O₁₈(O,OH,F)₄
Rarity : Very common

Size : µm / mm / cm / dm / m

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Infos

Trechmannite

Class : Sulfides and sulfosalts
Subclass : Sulfosalts
Crystal system : Trigonal
Chemistry : AgAsS₂
Rarity : Very rare

Size : µm / mm / cm / dm / m

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Infos

Troilite

Class : Sulfides and sulfosalts
Subclass : Sulfides
Crystal system : Trigonal
Chemistry : FeS
Rarity : Rare

Size : µm / mm / cm / dm / m

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Infos

Uvite

Class : Silicates
Subclass : Cyclosilicates
Crystal system : Trigonal
Chemistry : Ca(Mg,Fe)₃Al₅Mg(BO₃)₃Si₆O₁₈(OH,F)₄
Rarity : Uncommon

Size : µm / mm / cm / dm / m

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Infos

Valleriite

Class : Sulfides and sulfosalts
Subclass : Sulfides
Crystal system : Trigonal
Chemistry : 4(Fe,Cu)S 3(Mg,Al)(OH)₂
Rarity : Rare

Size : µm / mm / cm / dm / m

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Infos

Verdelite

Class : Silicates
Subclass : Cyclosilicates
Crystal system : Trigonal
Chemistry : Na(Al,Li)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄
Rarity : Uncommon

Size : µm / mm / cm / dm / m

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Infos

Weilerite

Class : Sulfates, chromates, molybdates
Subclass : Anhydrous sulfates
Crystal system : Trigonal
Chemistry : BaAl₃(AsO₄)(SO₄)(OH)₆
Rarity : Very rare

Size : µm / mm / cm / dm / m

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Infos

Whitlockite

Class : Phosphates, arsenates, vanadates
Subclass : Anhydrous phosphates
Crystal system : Trigonal
Chemistry : Ca₉(Mg,Fe)(PO₄)₆(PO₃OH)
Rarity : Uncommon

Size : µm / mm / cm / dm / m

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Infos

Willemite

Class : Silicates
Subclass : Nesosilicates
Crystal system : Trigonal
Chemistry : Zn₂SiO₄
Rarity : Fairly common to uncommon

Size : µm / mm / cm / dm / m

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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 ZBy classes By crystal systems By chemistry Mineral listMinerals for sale Encyclopedia Glossary

MINERALS OF TRIGONAL SYSTEM

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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