Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.24-2.292.55-2.57
1
7.18
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Fracture
Uneven, Subconchoidal, Conchoidal
Uneven
Cleavage
Very poor [100]
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
Mohs Hardness
5-5.56-6.5
2
10
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Chemical Composition
NaAlSi 2O 6 · H 2OMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
KAlSi3O8