Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.1-3.23.70-3.90
1
7.18
👆🏻
Fracture
-
Conchoidal
Cleavage
Vitreous, pearly on cleavage
Perfect on {011}, fair on {100}, poor on {110}
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
Cu 3(OH) 2(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references