Tenacity
-
Brittle
Solubility
Partly soluble in HCl.
-
Durability
-
-
Specific Gravity
3.32-3.435.6-5.76
1
7.18
👆🏻
Fracture
Conchoidal
Uneven
Cleavage
{100} perfect; {110} and {1 1 0} good; {010} poor
[001] perfect; [100] distinct
Mohs Hardness
5.5-62.5-3
2
10
👆🏻
Chemical Composition
(Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)