1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.29-3.332.69-2.72
1
7.18
1.5 Fracture
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001)
Uneven, Conchoidal, Gems, Sixth Edition (2006)
1.6 Cleavage
Not Available
Perfect on {001}, less perfect on {010}, intersecting at near 90°; distinct on {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)
(Na,Ca)1-2Si3-2O8