1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.43-3.446.50-7.00
1
7.18
1.5 Fracture
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009)
Irregular, Brittle, Conchoidal
1.6 Cleavage
None Observed
On {011}, distinct; on {001}, {013}, indistinct
1.7 Mohs Hardness
1.8 Chemical Composition
Ca 2(Mg,Al) 6(Si,Al,B) 6O 20Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
PbMoO 4Walter Schumann , Gemstones of the world (2001)