Tenacity
Brittle
-
Solubility
insoluble in water
-
Durability
-
-
Specific Gravity
5.00-5.202.69-2.79
1
7.18
👆🏻
Fracture
Uneven, Conchoidal, ConchoidalWalter Schumann
Conchoidal
Cleavage
Indistinct on {001}; partings on {011} and {111}
Poor on {0001}
Mohs Hardness
6-6.55.5-6.5
2
10
👆🏻
Chemical Composition
FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references