1 Physical Properties
1.1 Tenacity
1.2 Solubility
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Uneven, Uneven, Gems, Sixth Edition (2006), Uneven, Conchoidal
Uneven, Brittle, Metallic
1.6 Cleavage
Perfect on {001}, very good on {010}, imperfect on {110}
Indistinct on {011}
1.7 Mohs Hardness
1.8 Chemical Composition
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
CuFeS 2Anthony et al , Handbook of mineralogy (2001)