Tenacity
Brittle
-
Solubility
Dilute acid
-
Durability
-
-
Specific Gravity
2.93-2.965.05-5.22
1
7.18
👆🏻
Fracture
Subconchoidal, Conchoidal
Uneven
Cleavage
Distinct on {010}, imperfect {110} and {011}
None
Mohs Hardness
3.5-45.5-6
2
10
👆🏻
Chemical Composition
CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Zn,Mn2+ ,Fe2+ )(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)