1 Physical Properties
1.1 Tenacity
1.2 Solubility
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Irregular, Brittle, Conchoidal
Uneven, UnevenArthur Thomas, Gemstones (2009), Conchoidal, Brittle
1.6 Cleavage
On {011}, distinct; on {001}, {013}, indistinct
Imperfect on {110}
1.7 Mohs Hardness
1.8 Chemical Composition
PbMoO 4Walter Schumann , Gemstones of the world (2001)
(Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.