Tenacity
-
Brittle
Solubility
Partially soluble in water
slightly water soluble and in hot hydrochloric acid
Durability
-
-
Specific Gravity
1.773.00-3.25
1
7.18
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Fracture
-
Subconchoidal, Uneven, ConchoidalWalter Schumann
Cleavage
Perfect on {10 1 0}
Octahedral, perfect on {111}, parting on {011}
Mohs Hardness
2-2.54
2
10
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Chemical Composition
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
CaF2