Tenacity
-
-
Solubility
-
Soluble
Durability
-
-
Specific Gravity
3.05-3.083.06-3.25
1
7.18
👆🏻
Fracture
Subconchoidal, Uneven, Conchoidal
Sub-Conchoidal, Conchoidal, Uneven
Cleavage
Poor on {100}
Poor/indistinct on {100}
Mohs Hardness
54.5-5
2
10
👆🏻
Chemical Composition
Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
(Fe,Mn)AlPO 4(OH) 2 -H 2OArthur Thomas , Gemstones (2009)