OLIVENITE with CORNWALLITE

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This fine miniature from Wheal Unity, a mine neighbouring Wheal Gorland at St. Day in Cornwall, England, features Cornwallite which is one of the rarer copper arsenate species seen in these mines. The Cornwallite forms a pleasing matt, mid-green, box-work within which cavities are filled with glassy dark olive-green microcrystals of Olivenite. The whole assemblage appears to infill the centre of a partial nodule that is coated in more Olivenite along with dull black manganese oxides. Ex Malcolm Southwood collection, no. MS 2014.204, ex Cowen collection and ex Richard Barstow stock. Show more