Tenacity
Brittle
Brittle
Solubility
insoluble in water
-
Durability
-
-
Specific Gravity
5.00-5.202.97-3.03
1
7.18
👆🏻
Fracture
Uneven, Conchoidal, ConchoidalWalter Schumann
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
Indistinct on {001}; partings on {011} and {111}
{001} Poor
Mohs Hardness
6-6.57
2
10
👆🏻
Chemical Composition
FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CaB 2(SiO 4) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references