Tenacity
Brittle
-
Solubility
Easily soluble in cold dilute HCl
insoluble
Durability
-
-
Specific Gravity
4.126.46-6.57
1
7.18
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Fracture
Uneven
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
Good in two directions parallel to the prism faces {110}
Good [110] and [021]
Mohs Hardness
4-4.53-3.5
2
10
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Chemical Composition
CaZn(AsO4)(OH)
PbCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references