Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.1-3.22.25-2.40
1
7.18
👆🏻
Fracture
-
-
Cleavage
Vitreous, pearly on cleavage
perfect on {010}; good on {100}
Mohs Hardness
3-45-5.5
2
10
👆🏻
Chemical Composition
(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
NaCa 2Al 5Si 5O 20 · 6H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references