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
Brittle, Metallic
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
1.6 Cleavage
Imperfect in one direction
{010} perfect; {100} good, interrupted; {101} indistinct; {001} in traces
1.7 Mohs Hardness
1.8 Chemical Composition
CaCuAlSi 2O 6(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)
NaBePO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references