Tenacity
Brittle
-
Solubility
Soluble
-
Durability
-
-
Specific Gravity
3.25-3.351.97-2.22
1
7.18
👆🏻
Fracture
Conchoidal, ConchoidalWalter Schumann
Conchoidal
Cleavage
Perfect in three directions
None
Mohs Hardness
56-6.5
2
10
👆🏻
Chemical Composition
CuSiO 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001) More from other references