1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Conchoidal, Brittle, Conchoidal
Gemstones (2009), UnevenArthur Thomas, Gemstones (2009)
1.6 Cleavage
Good on [110] and on [001]
Not Available
1.7 Mohs Hardness
1.8 Chemical Composition
[ ]Na2(Mg3Al2)Si8O22(OH)2
BaSO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references