Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.29-3.333.05-3.21
1
7.18
👆🏻
Fracture
Uneven
-
Cleavage
Perfect
None
Mohs Hardness
57-7.5
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)
(Al,Mn3+ ) 2SiO 4OGemdat.org , Management Team (2012)