Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
5.50-5.903.16-3.43
1
7.18
👆🏻
Fracture
Conchoidal
Uneven, Conchoidal
Cleavage
On {10 1 0}, perfect; parting on {000 1 }
{110} Good, {110} Good
Mohs Hardness
45-6
2
10
👆🏻
Chemical Composition
(Zn,Mn2+ )OMichael OâDonoghue , Gems, Sixth Edition (2006)
(Ca,Na)(Mg,Fe,Al)Si 2O 6Anthony et al , Handbook of Mineralogy (2001)