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, ConchoidalAnthony et al, Handbook of mineralogy (2001)
Uneven, Uneven, Gems, Sixth Edition (2006)
1.6 Cleavage
Not Available
Perfect [001] good [010] poor [110]
1.7 Mohs Hardness
1.8 Chemical Composition
(Ca,Ce) 4 Na(Na,Ca) 2 Ti(Si 2 O 7 ) 2 F 2 (O,F) 2 Michael O’Donoghue, Gems, Sixth Edition (2006)
CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)