Tenacity
-
-
Solubility
Soluble
-
Durability
-
-
Specific Gravity
3.06-3.254.80-5.50
1
7.18
👆🏻
Fracture
Sub-Conchoidal, Conchoidal, Uneven
-
Cleavage
Poor/indistinct on {100}
Indistinct
Mohs Hardness
4.5-55-5.5
2
10
👆🏻
Chemical Composition
(Fe,Mn)AlPO 4(OH) 2 -H 2OArthur Thomas , Gemstones (2009)
(Ce,La,Nd,Th)PO 4Michael OâDonoghue , Gems, Sixth Edition (2006)