Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
6.50-7.003.03-3.18
1
7.18
👆🏻
Fracture
Irregular, Conchoidal
Uneven, Irregular, Conchoidal
Cleavage
On {011}, distinct; on {001}, {013}, indistinct
{???} Indistinct
Mohs Hardness
37-7.5
2
10
👆🏻
Chemical Composition
PbMoO 4Walter Schumann , Gemstones of the world (2001)
Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)