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
Splintery, Brittle, Uneven
1.6 Cleavage
Good in two directions parallel to the prism faces {110}
{110} perfect
1.7 Mohs Hardness
1.8 Chemical Composition
CaZn(AsO4)(OH)
NaCa 2(Mg 4Al)Si 6Al 2O 22(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)