Tenacity
-
Brittle
Solubility
insoluble in water
slightly water soluble and in hot hydrochloric acid
Durability
-
-
Specific Gravity
3.62-3.873.00-3.25
1
7.18
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Fracture
Conchoidal
Subconchoidal, Uneven, ConchoidalWalter Schumann
Cleavage
None
Octahedral, perfect on {111}, parting on {011}
Mohs Hardness
7-7.54
2
10
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Chemical Composition
Mg 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
CaF2