Tenacity
-
Brittle
Solubility
-
Soluble
Durability
-
-
Specific Gravity
3.1-3.23.25-3.35
1
7.18
👆🏻
Fracture
-
Conchoidal, ConchoidalWalter Schumann
Cleavage
Vitreous, pearly on cleavage
Perfect in three directions
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
CuSiO 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references