Tenacity
Brittle
Brittle
Solubility
Dilute acid
Soluble
Durability
-
-
Specific Gravity
2.93-2.964.1-4.3
1
7.18
👆🏻
Fracture
Subconchoidal, Conchoidal
Uneven
Cleavage
Distinct on {010}, imperfect {110} and {011}
Indistinct on {011}
Mohs Hardness
3.5-43.5-4
2
10
👆🏻
Chemical Composition
CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CuFeS 2Anthony et al , Handbook of mineralogy (2001)