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CC63267

KOLWEZITE with CALCITE, GOETHITE and CHRYSOCOLLA

KOLWEZITE with CALCITE, GOETHITE and CHRYSOCOLLA

Size:
47 x 61 x 32 mm
Weight:
106 g
£301.00 GBP
£301.00 GBP
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Detailed information

Species Kolwezite, Calcite, Goethite
Dimensions 47 x 61 x 32 mm
Weight 106 g
Locality Mashamba West Mine Kolwezi mining district Lualaba, DR Congo
Condition No recorded repairs
Looking like some sort of organic growth on top of this specimen, the puffball-like olive-green velvety spray of dense silky acicular crystals of Kolwezite is a really striking display of this ordinarily very rare copper cobalt carbonate hydroxide species. Known in noteworthy crystals from only the Democratic Republic of Congo, this fine piece comes from Mashamba West mine which has become in recent years the source of the very best crystallized specimens. Large miniature in size, this very fine example features a prominent 2.1 cm diameter bulb-like Kolwezite protrusion, but also a small linear growth of Kolwezite as well as a small Kolwezite-lined cavity. All of these are on, or within, an unusually 'contrasty' coloured matrix comprising very pale pink Calcite, pale turquoise-blue Chrysocolla and dark brown Goethite. This gives the specimen a certain distinctive character. The main Kolwezite aggregate is incomplete - worn, or naturally etched away on one side of the 'bulb' exposing its interior which reveals how its colour changes from bronzy olive-brown centrally but outwards to olive-green which dominates right through to the outside. However, its outer surfaces are just like velvet. Texturally, the Calcite forms small scalenohedra and the Goethite radial growths with botryoidal surfaces. The Chrysocolla is really only thin surface coatings, but adds a great colour into the mix. A fascinating and unusual specimen of the rare species Kolwezite and showing a great paragenetic assemblage too.

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I bought a specimen but it is not what I expected or was damaged in transit. Can I return the specimen?

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