Tenacity
Brittle
Brittle
Solubility
Soluble
Soluble
Durability
-
-
Specific Gravity
3.25-3.354.1-4.3
1
7.18
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Fracture
Conchoidal, ConchoidalWalter Schumann
Uneven
Cleavage
Perfect in three directions
Indistinct on {011}
Mohs Hardness
53.5-4
2
10
👆🏻
Chemical Composition
CuSiO 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CuFeS 2Anthony et al , Handbook of mineralogy (2001)