Tenacity
Brittle
Brittle
Solubility
slightly water soluble and in hot hydrochloric acid
-
Durability
-
-
Specific Gravity
3.00-3.255.00-5.30
1
7.18
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Fracture
Subconchoidal, Uneven, ConchoidalWalter Schumann
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
Octahedral, perfect on {111}, parting on {011}
None, may show partings on {0001} and {10 1 1}
Mohs Hardness
46
2
10
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Chemical Composition
CaF2
Fe 2O 3Arthur Thomas , Gemstones (2009)