Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
5.00-5.302.6-3.3
1
7.18
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Fracture
Uneven, ConchoidalWalter Schumann, Conchoidal
Lamellar
Cleavage
None, may show partings on {0001} and {10 1 1}
Perfect 001
Mohs Hardness
62-2.5
2
10
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Chemical Composition
Fe 2O 3Arthur Thomas , Gemstones (2009)
(Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6