Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.97-3.033.08-3.12
1
7.18
👆🏻
Fracture
Uneven, ConchoidalWalter Schumann, Conchoidal
ConchoidalWalter Schumann
Cleavage
{001} Poor
{010} Perfect
Mohs Hardness
77.5
2
10
👆🏻
Chemical Composition
CaB 2(SiO 4) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
BeAlSiO 4(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references