Tenacity
-
Brittle
Solubility
Soluble
-
Durability
-
-
Specific Gravity
3.06-3.255.9-6.3
1
7.18
👆🏻
Fracture
Sub-Conchoidal, Conchoidal, Uneven
Conchoidal, Uneven
Cleavage
Poor/indistinct on {100}
On {101}, distinct; on {112}, interrupted; on {001}, indistinct
Mohs Hardness
4.5-54.5-5
2
10
👆🏻
Chemical Composition
(Fe,Mn)AlPO 4(OH) 2 -H 2OArthur Thomas , Gemstones (2009)
CaWO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references