1 Physical Properties
2.2 Tenacity
Not Available
Not Available
2.3 Solubility
Not Available
Not Available
2.5 Durability
Not Available
Not Available
2.7 Specific Gravity
2.90-3.103.29-3.33
1
7.18
2.10 Fracture
Uneven, Conchoidal, Brittle, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001)
2.12 Cleavage
Poor/indistinct on {1120} and {1011}
Not Available
2.14 Mohs Hardness
2.15 Chemical Composition
Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) More from other references
(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)