Tenacity
Brittle
Brittle
Solubility
-
insoluble
Durability
-
-
Specific Gravity
5.00-5.303.15-3.21
1
7.18
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Fracture
Uneven, ConchoidalWalter Schumann, Conchoidal
Uneven, Subconchoidal
Cleavage
None, may show partings on {0001} and {10 1 1}
Perfect prismatic, two directions {110} ∧ {1 1 0} at 87°
Mohs Hardness
66-7
2
10
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Chemical Composition
Fe 2O 3Arthur Thomas , Gemstones (2009)
LiAlSi2O6