Tenacity
Brittle
Brittle
Solubility
Dilute acid
-
Durability
-
-
Specific Gravity
2.93-2.962.50
1
7.18
👆🏻
Fracture
Subconchoidal, Conchoidal
Uneven, Conchoidal
Cleavage
Distinct on {010}, imperfect {110} and {011}
Distinct on {100} and {110}
Mohs Hardness
3.5-45.5-6
2
10
👆🏻
Chemical Composition
CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
3NaAlSi 3O 8 · NaClAnthony et al , Handbook of mineralogy (2001)