Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.803.1-3.2
1
7.18
👆🏻
Fracture
-
-
Cleavage
Indistinct
Vitreous, pearly on cleavage
Mohs Hardness
83-4
2
10
👆🏻
Chemical Composition
(Mg,Fe)Al 2O 4Gemdat.org , Management Team (2012)
(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references