Tenacity
-
Brittle
Solubility
-
insoluble in water
Durability
-
-
Specific Gravity
3.08-3.125.00-5.20
1
7.18
👆🏻
Fracture
ConchoidalWalter Schumann
Uneven, Conchoidal, ConchoidalWalter Schumann
Cleavage
{010} Perfect
Indistinct on {001}; partings on {011} and {111}
Mohs Hardness
7.56-6.5
2
10
👆🏻
Chemical Composition
BeAlSiO 4(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references