Tenacity
-
Brittle
Solubility
-
Soluble
Durability
-
-
Specific Gravity
3.1-3.23.30-3.50
1
7.18
👆🏻
Fracture
-
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
Vitreous, pearly on cleavage
Perfect on {110}, poor on {101}, {001} rare
Mohs Hardness
3-45
2
10
👆🏻
Chemical Composition
(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references