Copper minerals: Showcase specimen and systematics

Copper minerals, especially the secondary compounds frequently found in the oxidized zones of Cu-bearing ore deposits, are safely placed among the all-time favourites of mineral collectors all over the world. The stunning variety of their colours and shapes has fascinated people since the first days of Cu mining. Some pretty examples for this diversity are provided by the specimen offered below, many of which stem from nowadays defunct mining locales.

 

Additionally, I can offer specimen out of a systematic collection of Copper minerals, comprising more than 90% of all specified Cu species. Please find more information here (link).  

JW-018 - Tennantite, Chalcopyrite & Quartz - 1.200 €

Cobre Mine, Concepción del Oro, Mun. de Concepción del Oro, Zacatecas, Mexico

Size: 13 x 12 x 9 cm

360° video and full resolution images

Rich clusters of tennantite crystals up to 2 cm size on white, drusy quartz crystals. One side of the specimen is covered with countless fine speckles of chalcopyrite. The tennantite crystals exhibit many faces with pristine metallic luster.

JW-002 - Cerussite and Malachite on Chalcocite - 650 €

Tsumeb, Otjikoto Region, Namibia

Size: 7.5 x 4.5 x 4.5 cm

360° video and full resolution image

A sculptural assembly of corroded chalcocite blades carries numerous translucent and lustrous cerussite crystals of up to 1 cm size. A botryoidal malachite coating covers most of the chalcocites and parts of some cerussites. Showy all around, this is a flawless specimen of attractive and rare paragenesis.

JW-004 - Chalcophyllite on Malachite - 1.600 €

Rancagua, Cachapoal Province, Libertador General Bernardo O'Higgins Region, Chile

Size: 11.5 x 6.5 x 5 cm

Full resolution images

Exceptional locality specimen of this rare Cu-species. Numerous cluster of teal-blue chalcophyllite blades on massy malachite aggregates with some sprays of azurite adding colour contrast. The backside of the specimen is cut. Ex R. A. Bideaux collection.

JW-005 - Azurite - 480 €

Aouli, Upper Moulouya lead district, Midelt Province, Drâa-Tafilalet Region, Morocco

Size: 10 x 8 x 4 cm

360° video and full resolution image

Interpenetrating azurite blades of navy blue colour on matrix. Corroded edges and faces alternate with lustrous sections what accounts for the contrast-rich appearance of the specimen.

JW-007 - Malachite ps. Azurite - 250 €

Tsumeb, Otjikoto Region, Namibia

Size: 11.5 x 5.5 x 3.5 cm

360° Video and full resolution images

Advanced pseudomorph stage of malachite replacing azurite. The cross-section shows a thickness of roughly 1-2 mm for the malachite layer (see video). Additional botryoidal malachite aggregates are scattered over the display side of the specimen. The simple term "matrix" does not at all embrace the character of the interesting piece of base rock of this specimen, holding several blue and green copper ore veins as well as cavities filled with quartz, calcite and azurite crystals.

JW-010 - Azurite (Chessylite) - 400 €

Chessy-les-Mines, Le Bois d'Oingt, Rhône, Auvergne-Rhône-Alpes, France

Size:  7.5 x 5.5 x 2.5 cm

360° Video and full resolution image

Sparkling, blocky azurite crystals in the vug of a matrix piece fully covered with a bright-blue microcrystalline azurite coating. The prismatic habitus of the azurite crystals is rather rare at this classic French locale, also luster and color saturation are above Chessy average.

Azurite with Malachite ps. Azurite - sold

Tsumeb, Otjikoto Region, Namibia

Size: 9.5 x 6.5 x 5.5 cm

360° video 

A historic specimen from the early years of mining in Tsumeb at the beginning of the 20th century. A sharp-edged, filligree cluster of malachite ps. azurite resides in a nest of sharp azurite needles. The azurite crystals are translucent and under strong illumination exhibit intense blazing-blue color. Some minor contacts along the periphery. Ex E. M. Gunnell collection.

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Impressum & Copyright: Jonas Norpoth, Wilhelmshöher Weg 16, D-34128 Kassel