Tenacity
-
Brittle
Solubility
Soluble
-
Durability
-
-
Specific Gravity
3.06-3.253.98-4.04
1
7.18
👆🏻
Fracture
Sub-Conchoidal, Conchoidal, Uneven
Conchoidal
Cleavage
Poor/indistinct on {100}
Imperfect, poor one {100}
Mohs Hardness
4.5-54.5-5
2
10
👆🏻
Chemical Composition
(Fe,Mn)AlPO 4(OH) 2 -H 2OArthur Thomas , Gemstones (2009)
Zn 2(AsO 4)(OH) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references