Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.1-3.22.30-2.60
1
7.18
👆🏻
Fracture
-
Uneven, Conchoidal
Cleavage
Vitreous, pearly on cleavage
{111} Imperfect
Mohs Hardness
3-45.5-6
2
10
👆🏻
Chemical Composition
(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Na 4AlBeSi 4O 12ClMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references