$1,100Median
33Sold (12 mo)
$5,250Last sale
COBALTKORITNIGITE with Erythrite
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The 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).
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| Date | Collector | Acquisition price |
|---|---|---|
| — | Crystal Classics | Not disclosed |
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