Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
5.85-6.153.85-3.94
1
7.18
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Fracture
Conchoidal
Conchoidal, Uneven
Cleavage
Fair in four directions forming octahedrons
{010} Good, {100} Distinct
Mohs Hardness
3.5-45-5.5
2
10
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Chemical Composition
Cu 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)