Tenacity
Solubility
Durability
Specific Gravity
Fracture
Cleavage
Mohs Hardness
Chemical Composition
Uneven, Subconchoidal, Conchoidal
NaAlSi 2O 6 · H 2OMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
On {011}, distinct; on {001}, {013}, indistinct
PbMoO 4Walter Schumann , Gemstones of the world (2001)