Tenacity
Brittle
-
Solubility
insoluble in water
-
Durability
-
-
Specific Gravity
5.00-5.203.43-3.44
1
7.18
👆🏻
Fracture
Uneven, Conchoidal, ConchoidalWalter Schumann
-
Cleavage
Indistinct on {001}; partings on {011} and {111}
None Observed
Mohs Hardness
6-6.56.5-7
2
10
👆🏻
Chemical Composition
FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ca 2(Mg,Al) 6(Si,Al,B) 6O 20Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references