Tenacity
Brittle
-
Solubility
slightly water soluble and in hot hydrochloric acid
-
Durability
-
-
Specific Gravity
3.00-3.252.55-2.63
1
7.18
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Fracture
Subconchoidal, Uneven, ConchoidalWalter Schumann
Uneven
Cleavage
Octahedral, perfect on {111}, parting on {011}
{001} Perfect, {010} Good
Mohs Hardness
46-6.5
2
10
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Chemical Composition
CaF2
KAlSi 3O 8Arthur Thomas , Gemstones (2009)