Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
5.00-5.303.26-3.41
1
7.18
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Fracture
Uneven, ConchoidalWalter Schumann, Conchoidal
Fibrous, ConchoidalWalter Schumann
Cleavage
None, may show partings on {0001} and {10 1 1}
Distinct on {100}, poor on {110}; parting on {001}
Mohs Hardness
67-8.5
2
10
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Chemical Composition
Fe 2O 3Arthur Thomas , Gemstones (2009)
AlAl6O3BSi3O18