Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.29-3.332.6-3.3
1
7.18
👆🏻
Fracture
Uneven
Lamellar
Cleavage
Perfect
Perfect 001
Mohs Hardness
52-2.5
2
10
👆🏻
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)
(Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6