Tenacity
Brittle
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.97-3.033.20-3.25
1
7.18
👆🏻
Fracture
Uneven, ConchoidalWalter Schumann, Conchoidal
Uneven, Conchoidal
Cleavage
{001} Poor
Good/distinct on [210]
Mohs Hardness
75.5
2
10
👆🏻
Chemical Composition
CaB 2(SiO 4) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Mg 2Si 2O 6Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references