Tenacity
Brittle
Brittle
Solubility
Soluble
Soluble
Durability
-
-
Specific Gravity
4.1-4.33.25-3.35
1
7.18
👆🏻
Fracture
Uneven
Conchoidal, ConchoidalWalter Schumann
Cleavage
Indistinct on {011}
Perfect in three directions
Mohs Hardness
3.5-45
2
10
👆🏻
Chemical Composition
CuFeS 2Anthony et al , Handbook of mineralogy (2001)
CuSiO 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references