Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
5.06-5.083.85-3.94
1
7.18
👆🏻
Fracture
Uneven, Subconchoidal, Conchoidal
Conchoidal, Uneven
Cleavage
Poor on [111].
{010} Good, {100} Distinct
Mohs Hardness
3-3.255-5.5
2
10
👆🏻
Chemical Composition
Cu5FeS4
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)