Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.1-3.23.63-3.9
1
7.18
👆🏻
Fracture
-
Conchoidal, Uneven
Cleavage
Vitreous, pearly on cleavage
Indistinct
Mohs Hardness
3-47.5-8
2
10
👆🏻
Chemical Composition
(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Mg,Fe2+ )Al 2O 4Gemdat.org , Management Team (2012) More from other references