1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Poorly soluble in dilute HCl
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
White, Yellow, Pale blue, Brittle, Uneven
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
1.6 Cleavage
Perfect on {100} and {010}, imperfect on {101}
Perfect on {10 1 1}, rhombohedral cleavage
1.7 Mohs Hardness
1.8 Chemical Composition
Not Available
CaMg(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references