Tenacity
Brittle
-
Solubility
Soluble
-
Durability
-
-
Specific Gravity
3.25-3.352.54-2.78
1
7.18
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Fracture
Conchoidal, ConchoidalWalter Schumann
Conchoidal
Cleavage
Perfect in three directions
Good in three directions
Mohs Hardness
55-6
2
10
👆🏻
Chemical Composition
CuSiO 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
K(Ca,Na) 2Si 4O 10(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references