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Dioptase
Dioptase

Enstatite
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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Brittle
Soluble
-
3.25-3.35
Conchoidal, ConchoidalWalter Schumann
Perfect in three directions
5
CuSiO 2(OH) 2Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
 
Brittle
-
-
3.20-3.25
Uneven, Conchoidal
Good/distinct on [210]
5.5
Mg 2Si 2O 6Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references