Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.24-2.292.50-2.80
1
7.18
👆🏻
Fracture
Uneven, Subconchoidal, Conchoidal
-
Cleavage
Very poor [100]
Perfect
Mohs Hardness
5-5.55-6.5
2
10
👆🏻
Chemical Composition
NaAlSi 2O 6 · H 2OMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
Na 4(Al,Si) 12O 24Cl to Ca 4(Si,Al) 12O 24(CO 3,SO 4)Arthur Thomas , Gemstones (2009)