Tenacity
Brittle
-
Solubility
slightly water soluble and in hot hydrochloric acid
-
Durability
-
-
Specific Gravity
3.00-3.252.50-2.80
1
7.18
👆🏻
Fracture
Subconchoidal, Uneven, ConchoidalWalter Schumann
-
Cleavage
Octahedral, perfect on {111}, parting on {011}
Perfect
Mohs Hardness
45-6.5
2
10
👆🏻
Chemical Composition
CaF2
Na 4(Al,Si) 12O 24Cl to Ca 4(Si,Al) 12O 24(CO 3,SO 4)Arthur Thomas , Gemstones (2009)