1 Physical Properties
1.1 Tenacity
1.2 Solubility
Poorly soluble in dilute HCl
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Brittle, Metallic
1.6 Cleavage
Perfect on {10 1 1}, rhombohedral cleavage
Imperfect in one direction
1.7 Mohs Hardness
1.8 Chemical Composition
CaMg(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CaCuAlSi 2O 6(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)