Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.05-3.212.72-2.75
1
7.18
👆🏻
Fracture
Uneven, Subconchoidal, Splintery
Uneven
Cleavage
Good on {110}, poor on {100}
Perfect on [001], good on [010], imperfect on [110]
Mohs Hardness
7.56-6.5
2
10
👆🏻
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Ca(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)