Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.1-3.23.25-3.45
1
7.18
👆🏻
Fracture
-
Conchoidal, Uneven
Cleavage
Vitreous, pearly on cleavage
Good on {110}
Mohs Hardness
3-46.5
2
10
👆🏻
Chemical Composition
(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Mg 3Al 6(Si,Al,B) 5O 21(OH)Walter Schumann , Gemstones of the world (2001) More from other references