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
2.80-2.952.08-2.16
1
7.18
1.5 Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Irregular/uneven, UnevenArthur Thomas, Gemstones (2009)
1.6 Cleavage
Perfect on {10 1 1}, rhombohedral cleavage
distinct/good on {1011}
1.7 Mohs Hardness
1.8 Chemical Composition
CaMg(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CaAl 2Si 4O 12 -6H 2OArthur Thomas , Gemstones (2009)