Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.60-2.653.2-3.4
1
7.18
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Fracture
Uneven, Conchoidal
Uneven
Cleavage
Perfect on {001}, very good on {010}, imperfect on {110}
Perfect on [001] imperfect on [100]
Mohs Hardness
6-6.53
2
10
👆🏻
Chemical Composition
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)