Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.1-3.23.29-3.33
1
7.18
👆🏻
Fracture
-
Uneven
Cleavage
Vitreous, pearly on cleavage
Perfect
Mohs Hardness
3-45
2
10
👆🏻
Chemical Composition
(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Ca,Ce) 4 Na(Na,Ca) 2 Ti(Si 2 O 7 ) 2 F 2 (O,F) 2 Michael O’Donoghue, Gems, Sixth Edition (2006)