Tenacity
Brittle
Brittle
Solubility
-
slightly water soluble and in hot hydrochloric acid
Durability
-
-
Specific Gravity
5.00-5.303.00-3.25
1
7.18
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Fracture
Uneven, ConchoidalWalter Schumann, Conchoidal
Subconchoidal, Uneven, ConchoidalWalter Schumann
Cleavage
None, may show partings on {0001} and {10 1 1}
Octahedral, perfect on {111}, parting on {011}
Mohs Hardness
64
2
10
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Chemical Composition
Fe 2O 3Arthur Thomas , Gemstones (2009)
CaF2