Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.1-3.23.26-3.41
1
7.18
👆🏻
Fracture
-
Fibrous, ConchoidalWalter Schumann
Cleavage
Vitreous, pearly on cleavage
Distinct on {100}, poor on {110}; parting on {001}
Mohs Hardness
3-47-8.5
2
10
👆🏻
Chemical Composition
(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
AlAl6O3BSi3O18