1 Physical Properties
1.1 Tenacity
1.2 Solubility
Partly soluble in HCl.
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.32-3.432.42-2.52
1
7.18
1.5 Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Irregular/uneven, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
1.6 Cleavage
{100} perfect; {110} and {1 1 0} good; {010} poor
Perfect on {10 1 0}, poor on {0001}
1.7 Mohs Hardness
1.8 Chemical Composition
(Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Na 2Ca 2Al 6Si 6O 24(CO 3) 2Walter Schumann , Gemstones of the world (2001) More from other references