Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.04-3.17-9999
1
7.18
👆🏻
Fracture
Uneven
-
Cleavage
{001} Indistinct, {???} Indistinct
-
Mohs Hardness
5.5-9999
2
10
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Chemical Composition
(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references
SiO2, Al2O3, CaO, MgO, FeO