Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.60-2.642.74-2.76
1
7.18
👆🏻
Fracture
Uneven, Splintery, Conchoidal
Uneven
Cleavage
Absent
{010} Perfect, {001} Distinct
Mohs Hardness
6.5-73.5-4
2
10
👆🏻
Chemical Composition
SiO 2Arthur Thomas , Gemstones (2009)
Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)