Tenacity
-
-
Solubility
Partly soluble in HCl.
-
Durability
-
-
Specific Gravity
3.32-3.433.1-3.2
1
7.18
👆🏻
Fracture
Conchoidal
-
Cleavage
{100} perfect; {110} and {1 1 0} good; {010} poor
Vitreous, pearly on cleavage
Mohs Hardness
5.5-63-4
2
10
👆🏻
Chemical Composition
(Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references