Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.264.80-5.50
1
7.18
👆🏻
Fracture
Uneven
-
Cleavage
None
Indistinct
Mohs Hardness
-99995-5.5
2
10
👆🏻
Chemical Composition
NaFe3+3Fe3+6(BO 3) 3Si 6O 18(O,OH) 4Anthony et al , Handbook of Mineralogy (2001)
(Ce,La,Nd,Th)PO 4Michael OâDonoghue , Gems, Sixth Edition (2006)