Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.50-2.80-9999
1
7.18
👆🏻
Fracture
-
-
Cleavage
Perfect
-
Mohs Hardness
5-6.5-9999
2
10
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Chemical Composition
Na 4(Al,Si) 12O 24Cl to Ca 4(Si,Al) 12O 24(CO 3,SO 4)Arthur Thomas , Gemstones (2009)
SiO2, Al2O3, CaO, MgO, FeO