1 Physical Properties
1.1 Tenacity
1.2 Solubility
Partly soluble in HCl.
Easily soluble in cold dilute HCl
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Brittle, Uneven, Brittle, Uneven
1.6 Cleavage
{100} perfect; {110} and {1 1 0} good; {010} poor
Good in two directions parallel to the prism faces {110}
1.7 Mohs Hardness
1.8 Chemical Composition
(Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CaZn(AsO4)(OH)