Tenacity
Brittle
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
6.50-7.003.90-4.00
1
7.18
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Fracture
Irregular, Conchoidal
Conchoidal
Cleavage
On {011}, distinct; on {001}, {013}, indistinct
Perfect on {001}, good on {210}, poor on {010}
Mohs Hardness
33-3.5
2
10
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Chemical Composition
PbMoO 4Walter Schumann , Gemstones of the world (2001)
SrSO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references