Tenacity
-
-
Solubility
Partly soluble in HCl.
-
Durability
-
-
Specific Gravity
3.32-3.432.82
1
7.18
👆🏻
Fracture
Conchoidal
-
Cleavage
{100} perfect; {110} and {1 1 0} good; {010} poor
Perfect in one direction, indistinct in one direction
Mohs Hardness
5.5-66
2
10
👆🏻
Chemical Composition
(Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
K2Na(Ca,Mn)2Ti[O|Si7O18(OH)]