Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.1-3.23.55-3.70
1
7.18
👆🏻
Fracture
-
-
Cleavage
Vitreous, pearly on cleavage
Perfect
Mohs Hardness
3-44-7
2
10
👆🏻
Chemical Composition
(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Al 2SiO 5Arthur Thomas , Gemstones (2009) More from other references