Tenacity
Brittle
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.97-3.032.50
1
7.18
👆🏻
Fracture
Uneven, ConchoidalWalter Schumann, Conchoidal
Uneven, Conchoidal
Cleavage
{001} Poor
Distinct on {100} and {110}
Mohs Hardness
75.5-6
2
10
👆🏻
Chemical Composition
CaB 2(SiO 4) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
3NaAlSi 3O 8 · NaClAnthony et al , Handbook of mineralogy (2001)