Australian Erythrite Specimen from Mt Cobalt, Queensland.

A very pretty solid specimen with gorgeous florets of Eurithrite without base rock.

Length is 38mm

Width is 44mm

Depth is 23mm

Weight is 28.6grams

Erythrite, also called Cobalt Bloom, arsenate mineral in the vivianite group, hydrated cobalt arsenate [Co3(AsO4)2·8H2O]. Erythrite, which is used as a guide to the presence of cobalt-nickel-silver ores because of its crimson or peach-red colour, occurs as radiating crystals, concretions, or earthy masses in the oxidized zone of cobalt and nickel deposits. It forms a complete solid-solution series with annabergite, in which nickel replaces cobalt in the erythrite structure. As the nickel content increases, the colour lightens to white, gray, or pale green.

Photos taken with an Apple iPad in natural daylight

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