COBALTKORITNIGITE with Erythrite
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Tucson, Arizona, USAThe mines at Bou Azzer in Morocco have undoubtedly produced the world's finest Erythrite crystals but they have produced some of the best Cobaltkoritnigite specimens too. The former is a hydrated cobalt arsenate and the latter - hydrated cobalt arsenite hydroxide - indicating a very slight shift in the geochemical conditions during growth within the supergene secondary environment. This lovely brightly coloured miniature specimen features very glossy deep pink-purple bladed monoclinic Erythrite crystals (to 3.5 mm long) lining a 1.4 x 1.4 cm open cavity in heavily oxidized Skutterudite. Alongside this cavity - and actually infilling a much larger cavity - is more Erythrite, but also finely crystallized silky bubblegum-pink acicular Cobaltkoritnigite in areas extending to 1.4 x 1 cm. Under magnification this Cobaltkoritnigite is extremely well-crystallized and world-class in extent and quality. A very pretty rarity from the superb systematic collection assembled by the brothers Martin and Michael Günther (1951-2007 & 1956-2021).
Product details
Species
SizeMiniature
Dimensions4.2 x 4.3 x 3.0 cm
Listed on03/17/2025
SKUCC27719
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Mineral guide
Learn about Erythrite
vivid crimson-to-magenta acicular crystals, radiating sprays on calcite; prized for color, rarity, and historic Moroccan Bou Azzer finds.
Regional guide
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