1 Physical Properties
1.1 Tenacity
1.2 Solubility
Easily soluble in cold dilute HCl
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Brittle, Uneven, Brittle, Uneven
Uneven, Uneven, Gems, Sixth Edition (2006), Uneven, Conchoidal
1.6 Cleavage
Good in two directions parallel to the prism faces {110}
Perfect on {001}, very good on {010}, imperfect on {110}
1.7 Mohs Hardness
1.8 Chemical Composition
CaZn(AsO4)(OH)
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)