1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Uneven, Uneven, Gems, Sixth Edition (2006)
Not Available
1.6 Cleavage
Perfect on [001], good on [010], imperfect on [110]
Not Available
1.7 Mohs Hardness
1.8 Chemical Composition
Ca(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
(Mg,Fe) 2Si 2O 6Ulrich Henn and Claudio C.