Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.54-2.613.76-3.77
1
7.18
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Fracture
Uneven
-
Cleavage
{001} Perfect, {010} Good
{110} Perfect, {110} Perfect
Mohs Hardness
65-6
2
10
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Chemical Composition
KAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
(Fe,Mn) 7Si 7O 21Ulrich Henn and Claudio C.