General Information: Chemical Formula:Cu2AsO4(OH)
Composition:(Molecular Weight = 283.02 gm)
Copper 44.91 %
CuArsenic 26.47 %
AsHydrogen 0.36 %
H Oxygen 28.27 %
O Empirical Formula: Cu2(AsO4)(OH)
Name Origin:From the German olivernerz, literally "olive" ore, in allusion to its typical color.
Physical Properties: Cleavage:[110] Indistinct, [010] Indistinct, [110] Indistinct
Color:olive green, yellowish brown, dirty white, blackish green, or liver brown.
Density:4.1 - 4.4, Average = 4.25
Diaphaniety:Subtransparent to translucent to opaque
Habits:Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite), Reniform - "Kidney like" i n shape (e.g.. hematite).
Hardness:3 - Calcite
Luminescence:None.
Luster:Vitreous - Greasy
Streak:yellowish green
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