Tenacity
Brittle
-
Solubility
-
insoluble
Durability
-
-
Specific Gravity
5.85-6.156.46-6.57
1
7.18
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Fracture
Conchoidal
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
Fair in four directions forming octahedrons
Good [110] and [021]
Mohs Hardness
3.5-43-3.5
2
10
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Chemical Composition
Cu 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
PbCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references