Tenacity
-
Brittle
Solubility
-
slightly water soluble and in hot hydrochloric acid
Durability
-
-
Specific Gravity
2.44-2.623.00-3.25
1
7.18
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Fracture
Uneven
Subconchoidal, Uneven, ConchoidalWalter Schumann
Cleavage
Indiscernible
Octahedral, perfect on {111}, parting on {011}
Mohs Hardness
2.5-5.54
2
10
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Chemical Composition
H 4Mg 3Si 2O 9Walter Schumann , Gemstones of the world (2001) More from other references
CaF2