Tenacity
-
Brittle
Solubility
-
Dilute acid
Durability
-
-
Specific Gravity
3.1-3.22.93-2.96
1
7.18
👆🏻
Fracture
-
Subconchoidal, Conchoidal
Cleavage
Vitreous, pearly on cleavage
Distinct on {010}, imperfect {110} and {011}
Mohs Hardness
3-43.5-4
2
10
👆🏻
Chemical Composition
(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references