Tenacity
Brittle
-
Solubility
Soluble
-
Durability
-
-
Specific Gravity
3.25-3.352.71-2.72
1
7.18
👆🏻
Fracture
Conchoidal, ConchoidalWalter Schumann
Fibrous
Cleavage
Perfect in three directions
{???} Good
Mohs Hardness
56-6.5
2
10
👆🏻
Chemical Composition
CuSiO 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ca 6Si 6O 17(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)