Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
6.50-7.003.19-3.56
1
7.18
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Fracture
Irregular, Conchoidal
Uneven, Conchoidal
Cleavage
On {011}, distinct; on {001}, {013}, indistinct
{110} Perfect, {010} Indistinct
Mohs Hardness
35.5-6
2
10
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Chemical Composition
PbMoO 4Walter Schumann , Gemstones of the world (2001)
(Ca,Na)(Mg,Fe,Al,Ti)(Si,Al) 2O 6Anthony et al , Handbook of mineralogy (2001)