Tenacity
Brittle
-
Solubility
Dilute acid
-
Durability
-
-
Specific Gravity
2.93-2.962.6-3.3
1
7.18
👆🏻
Fracture
Subconchoidal, Conchoidal
Lamellar
Cleavage
Distinct on {010}, imperfect {110} and {011}
Perfect 001
Mohs Hardness
3.5-42-2.5
2
10
👆🏻
Chemical Composition
CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6