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Elpidite


A rare mineral from various origins.

Chemistry : 
Na2ZrSi6O15 3H2O
System : Orthorhombic


Emerald

from various origins.

Green beryl variety, color is due to chromium and vanadium.

Chemistry : Be3Al2Si6O18
System : Hexagonal

Epidote

from various origins.

Mineral from metamorphic rocks.

Chemistry : Ca3Al2 (Si2O7) (SiO4) O (OH, F)
System : Monoclinic

Erythrite

from various origins.

Oxidation mineral from cobalt deposits.

Chemistry : Co3(AsO4)2 8H2O
System : Monoclinic

Ettringite

Mineral of carbonate environments

Chemistry : Ca6Al2(SO4)3(OH)12 · 26H2O
System : Trigonal

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