Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.95-4.103.16-3.43
1
7.18
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Fracture
Uneven
Uneven, Conchoidal
Cleavage
{110} Perfect, {110} Perfect, {110} Perfect
{110} Good, {110} Good
Mohs Hardness
3.5-45-6
2
10
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Chemical Composition
(Zn,Fe)SMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Ca,Na)(Mg,Fe,Al)Si 2O 6Anthony et al , Handbook of Mineralogy (2001)