Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.04-3.172.60-2.64
1
7.18
👆🏻
Fracture
Uneven
Uneven, Splintery, Conchoidal
Cleavage
{001} Indistinct, {???} Indistinct
Absent
Mohs Hardness
5.56.5-7
2
10
👆🏻
Chemical Composition
(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references
SiO 2Arthur Thomas , Gemstones (2009)