Tenacity
Brittle
-
Solubility
slightly water soluble and in hot hydrochloric acid
-
Durability
-
-
Specific Gravity
3.00-3.253.63-3.9
1
7.18
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Fracture
Subconchoidal, Uneven, ConchoidalWalter Schumann
Conchoidal, Uneven
Cleavage
Octahedral, perfect on {111}, parting on {011}
Indistinct
Mohs Hardness
47.5-8
2
10
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Chemical Composition
CaF2
(Mg,Fe2+ )Al 2O 4Gemdat.org , Management Team (2012) More from other references