Tenacity
-
Brittle
Solubility
Soluble
insoluble in water
Durability
-
-
Specific Gravity
3.06-3.255.00-5.20
1
7.18
👆🏻
Fracture
Sub-Conchoidal, Conchoidal, Uneven
Uneven, Conchoidal, ConchoidalWalter Schumann
Cleavage
Poor/indistinct on {100}
Indistinct on {001}; partings on {011} and {111}
Mohs Hardness
4.5-56-6.5
2
10
👆🏻
Chemical Composition
(Fe,Mn)AlPO 4(OH) 2 -H 2OArthur Thomas , Gemstones (2009)
FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references