1 Physical Properties
1.1 Tenacity
1.2 Solubility
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Brittle, Metallic
1.6 Cleavage
Perfect on [10 1 1] three directions with angle of 74° 55
Imperfect in one direction
1.7 Mohs Hardness
1.8 Chemical Composition
CaCO 3Ulrich Henn and Claudio C.
CaCuAlSi 2O 6(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)