Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.97-3.032.65-2.90
1
7.18
👆🏻
Fracture
Uneven, ConchoidalWalter Schumann, Conchoidal
-
Cleavage
{001} Poor
{001} Perfect
Mohs Hardness
7-9999
2
10
👆🏻
Chemical Composition
CaB 2(SiO 4) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references