Tenacity
Brittle
Brittle
Solubility
insoluble in water
Soluble
Durability
-
-
Specific Gravity
5.00-5.203.25-3.35
1
7.18
👆🏻
Fracture
Uneven, Conchoidal, ConchoidalWalter Schumann
Conchoidal, ConchoidalWalter Schumann
Cleavage
Indistinct on {001}; partings on {011} and {111}
Perfect in three directions
Mohs Hardness
6-6.55
2
10
👆🏻
Chemical Composition
FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CuSiO 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references