Tenacity
Brittle
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
5.00-5.302.77
1
7.18
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Fracture
Uneven, ConchoidalWalter Schumann, Conchoidal
Uneven
Cleavage
None, may show partings on {0001} and {10 1 1}
Perfect [001] good [010] poor [110]
Mohs Hardness
66-6.5
2
10
👆🏻
Chemical Composition
Fe 2O 3Arthur Thomas , Gemstones (2009)
CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)