Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
-99992.50-2.80
1
7.18
👆🏻
Fracture
-
-
Cleavage
-
Perfect
Mohs Hardness
75-6.5
2
10
👆🏻
Chemical Composition
-
Na 4(Al,Si) 12O 24Cl to Ca 4(Si,Al) 12O 24(CO 3,SO 4)Arthur Thomas , Gemstones (2009)