Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.1-3.23.04-3.17
1
7.18
👆🏻
Fracture
-
Uneven
Cleavage
Vitreous, pearly on cleavage
{001} Indistinct, {???} Indistinct
Mohs Hardness
3-45.5
2
10
👆🏻
Chemical Composition
(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references