Tenacity
Brittle
-
Solubility
Easily soluble in cold dilute HCl
-
Durability
-
-
Specific Gravity
4.124.95-5.0
1
7.18
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Fracture
Uneven
Uneven
Cleavage
Good in two directions parallel to the prism faces {110}
Imperfect to indistinct on {10 1 0}, parting on {0001}
Mohs Hardness
4-4.54-5
2
10
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Chemical Composition
CaZn(AsO4)(OH)
(Ce,La)(CO 3)FMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references