Tenacity
-
Brittle
Solubility
Soluble
Soluble
Durability
-
-
Specific Gravity
2.55-2.703.25-3.35
1
7.18
👆🏻
Fracture
Uneven, Splintery, Conchoidal
Conchoidal, ConchoidalWalter Schumann
Cleavage
Absent
Perfect in three directions
Mohs Hardness
6.5-75
2
10
👆🏻
Chemical Composition
SiO2
CuSiO 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references