Tenacity
-
Brittle
Solubility
-
insoluble in water
Durability
-
-
Specific Gravity
5.355.00-5.20
1
7.18
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Fracture
Conchoidal
Uneven, Conchoidal, ConchoidalWalter Schumann
Cleavage
Perfect on {100}, imperfect on {001}
Indistinct on {001}; partings on {011} and {111}
Mohs Hardness
2.56-6.5
2
10
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Chemical Composition
PbCu(SO 4)(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references