1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Insoluble in acids
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
5.06-5.084.20-4.30
1
7.18
1.7 Fracture
Uneven, Subconchoidal, Conchoidal, Brittle
Uneven, ConchoidalArthur Thomas, Gemstones (2009)
1.8 Cleavage
Poor on [111].
{110} good, 100 moderate, parting on {092} and {011}
1.9 Mohs Hardness
1.13 Chemical Composition
Cu5FeS4
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)