Tenacity
Brittle
Brittle
Solubility
Soluble
-
Durability
-
-
Specific Gravity
4.1-4.35.00-5.30
1
7.18
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Fracture
Uneven
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
Indistinct on {011}
None, may show partings on {0001} and {10 1 1}
Mohs Hardness
3.5-46
2
10
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Chemical Composition
CuFeS 2Anthony et al , Handbook of mineralogy (2001)
Fe 2O 3Arthur Thomas , Gemstones (2009)