Tenacity
Brittle
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
6.50-7.002.65
1
7.18
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Fracture
Irregular, Conchoidal
Conchoidal, ConchoidalWalter Schumann
Cleavage
On {011}, distinct; on {001}, {013}, indistinct
3,1
Mohs Hardness
37
2
10
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Chemical Composition
PbMoO 4Walter Schumann , Gemstones of the world (2001)
SiO 2Ulrich Henn and Claudio C.