1 Physical Properties
1.1 Tenacity
1.2 Solubility
Dilute acid
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.93-2.963.04-3.26
1
7.18
1.5 Fracture
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Splintery, Brittle, Uneven
1.6 Cleavage
Distinct on {010}, imperfect {110} and {011}
{110} perfect
1.7 Mohs Hardness
1.8 Chemical Composition
CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
NaCa 2(Mg 4Al)Si 6Al 2O 22(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)