Tenacity
Brittle
Brittle
Solubility
insoluble in water
Soluble
Durability
-
-
Specific Gravity
5.00-5.203.30-3.50
1
7.18
👆🏻
Fracture
Uneven, Conchoidal, ConchoidalWalter Schumann
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
Indistinct on {001}; partings on {011} and {111}
Perfect on {110}, poor on {101}, {001} rare
Mohs Hardness
6-6.55
2
10
👆🏻
Chemical Composition
FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references