Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.1-3.23.70-3.95
1
7.18
👆🏻
Fracture
-
-
Cleavage
Vitreous, pearly on cleavage
1,1 basal.
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) 2 + Cu 2(CO 3)(OH) 2Gemdat.org , Management Team (2012)