Tenacity
Brittle
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.656.50-7.00
1
7.18
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Fracture
Conchoidal, ConchoidalWalter Schumann
Irregular, Conchoidal
Cleavage
3,1
On {011}, distinct; on {001}, {013}, indistinct
Mohs Hardness
73
2
10
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Chemical Composition
SiO 2Ulrich Henn and Claudio C.
PbMoO 4Walter Schumann , Gemstones of the world (2001)