Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.79-3.943.1-3.2
1
7.18
👆🏻
Fracture
Lamellar, Splintery
-
Cleavage
{100} Good, {001} Good, {010} Poor
Vitreous, pearly on cleavage
Mohs Hardness
43-4
2
10
👆🏻
Chemical Composition
FeAs
(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references