Tenacity
Solubility
Durability
Specific Gravity
Fracture
Cleavage
Mohs Hardness
Chemical Composition
FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Fair in four directions forming octahedrons
Cu 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references