Tenacity
Brittle
Brittle
Solubility
Soluble
-
Durability
-
-
Specific Gravity
3.25-3.352.90-3.00
1
7.18
👆🏻
Fracture
Conchoidal, ConchoidalWalter Schumann
Conchoidal, Uneven
Cleavage
Perfect in three directions
None
Mohs Hardness
55-5.5
2
10
👆🏻
Chemical Composition
CuSiO 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CaBSiO 4(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references