Tenacity
Brittle
Brittle
Solubility
Soluble
-
Durability
-
-
Specific Gravity
3.25-3.352.33-2.37
1
7.18
👆🏻
Fracture
Conchoidal, ConchoidalWalter Schumann
ConchoidalWalter Schumann
Cleavage
Perfect in three directions
Perfect on {010}, good on {100}
Mohs Hardness
57.5
2
10
👆🏻
Chemical Composition
CuSiO 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Be 2BO 3(OH)Ulrich Henn and Claudio C.