Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.97-3.033.43-3.44
1
7.18
👆🏻
Fracture
Uneven, ConchoidalWalter Schumann, Conchoidal
-
Cleavage
{001} Poor
None Observed
Mohs Hardness
76.5-7
2
10
👆🏻
Chemical Composition
CaB 2(SiO 4) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ca 2(Mg,Al) 6(Si,Al,B) 6O 20Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references