Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.76-3.774.80-5.50
1
7.18
👆🏻
Fracture
-
-
Cleavage
{110} Perfect, {110} Perfect
Indistinct
Mohs Hardness
5-65-5.5
2
10
👆🏻
Chemical Composition
(Fe,Mn) 7Si 7O 21Ulrich Henn and Claudio C.
(Ce,La,Nd,Th)PO 4Michael OâDonoghue , Gems, Sixth Edition (2006)