1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Conchoidal, Metallic, UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Not Available
1.6 Cleavage
Fair in four directions forming octahedrons
None
1.7 Mohs Hardness
1.8 Chemical Composition
Cu 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CaAlB 3O 7Michael OâDonoghue , Gems, Sixth Edition (2006)