Tenacity
-
Brittle
Solubility
-
Soluble
Durability
-
-
Specific Gravity
3.95-4.102.20-2.23
1
7.18
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Fracture
Uneven
Irregular/uneven, Uneven
Cleavage
{110} Perfect, {110} Perfect, {110} Perfect
Perfect on {110} and {1 1 0}
Mohs Hardness
3.5-45-5.5
2
10
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Chemical Composition
(Zn,Fe)SMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CaAl 2Si 3O 10 · 3H 2OUlrich Henn and Claudio C.