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Prase Opal
Prase Opal

Violane
Violane



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Prase Opal
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Violane

Physical Properties

Tenacity

-
-

Solubility

-
-

Durability

-
-

Specific Gravity

1.98-2.253.22-3.40
1 7.18
👆🏻

Fracture

Conchoidal
Conchoidal

Cleavage

None
Perfect

Mohs Hardness

5-6.55-6
2 10
👆🏻

Chemical Composition

SiO 2 + H 2OUlrich Henn and Claudio C.
(Ca,Mg,Mn)SiO 3Gemdat.org , Management Team (2012)