Tenacity
Brittle
Brittle
Solubility
-
Effervesces in hot HCl
Durability
-
-
Specific Gravity
2.97-3.032.92-3.12
1
7.18
👆🏻
Fracture
Uneven, ConchoidalWalter Schumann, Conchoidal
Conchoidal
Cleavage
{001} Poor
[10 1 1] perfect
Mohs Hardness
73.5-4.5
2
10
👆🏻
Chemical Composition
CaB 2(SiO 4) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
MgCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references