Tenacity
Brittle
-
Solubility
slightly water soluble and in hot hydrochloric acid
-
Durability
-
-
Specific Gravity
3.00-3.252.60-2.64
1
7.18
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Fracture
Subconchoidal, Uneven, ConchoidalWalter Schumann
Uneven, Splintery, Conchoidal
Cleavage
Octahedral, perfect on {111}, parting on {011}
Absent
Mohs Hardness
46.5-7
2
10
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Chemical Composition
CaF2
SiO 2Arthur Thomas , Gemstones (2009)