Tenacity
-
Brittle
Solubility
Insoluble: HCl
Soluble
Durability
-
-
Specific Gravity
3.61-3.683.25-3.35
1
7.18
👆🏻
Fracture
Conchoidal
Conchoidal, ConchoidalWalter Schumann
Cleavage
[10 1 1] poor
Perfect in three directions
Mohs Hardness
6-6.55
2
10
👆🏻
Chemical Composition
BaTiSi 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CuSiO 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references