Tenacity
-
Brittle
Solubility
-
slightly water soluble and in hot hydrochloric acid
Durability
-
-
Specific Gravity
2.55-2.633.00-3.25
1
7.18
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Fracture
Uneven
Subconchoidal, Uneven, ConchoidalWalter Schumann
Cleavage
{001} Perfect, {010} Good
Octahedral, perfect on {111}, parting on {011}
Mohs Hardness
6-6.54
2
10
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Chemical Composition
KAlSi 3O 8Arthur Thomas , Gemstones (2009)
CaF2