Tenacity
Brittle
Brittle
Solubility
slightly water soluble and in hot hydrochloric acid
-
Durability
-
-
Specific Gravity
3.00-3.256.5-7.1
1
7.18
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Fracture
Subconchoidal, Uneven, ConchoidalWalter Schumann
Uneven, Conchoidal
Cleavage
Octahedral, perfect on {111}, parting on {011}
Imperfect- [10 1 1]
Mohs Hardness
43.5-4
2
10
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Chemical Composition
CaF2
Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)