Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.60-2.643.04-3.17
1
7.18
👆🏻
Fracture
Uneven, Splintery, Conchoidal
Uneven
Cleavage
Absent
{001} Indistinct, {???} Indistinct
Mohs Hardness
6.5-75.5
2
10
👆🏻
Chemical Composition
SiO 2Arthur Thomas , Gemstones (2009)
(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references