Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.60-2.652.55-2.57
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
Uneven
Cleavage
Perfect on {001}, very good on {010}, imperfect on {110}
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
Mohs Hardness
6-6.56-6.5
2
10
👆🏻
Chemical Composition
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
KAlSi3O8