Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.60-2.646.50-7.00
1
7.18
👆🏻
Fracture
Uneven, Splintery, Conchoidal
Irregular, Conchoidal
Cleavage
Absent
On {011}, distinct; on {001}, {013}, indistinct
Mohs Hardness
6.5-73
2
10
👆🏻
Chemical Composition
SiO 2Arthur Thomas , Gemstones (2009)
PbMoO 4Walter Schumann , Gemstones of the world (2001)