Conichalcite, Malachite xls; Tsumeb Mine, Otavi Mountains, Namibia; TN; unique piece
Conichalcite and Malachite crystals from the Tsumeb Mine, Otavi Mountains, Namibia – micromount as unique piece
This micromount shows Conichalcite and Malachite crystals from the Tsumeb Mine, Otavi Mountains, Namibia. Bright green crystal areas stand out clearly against the light to yellowish green matrix. Conichalcite forms fine crystalline, vivid yellow green coatings and small aggregates with clearly visible crystal structure. In cavities and on fracture surfaces, intensely emerald green Malachite crystals occur, forming compact and partly velvety looking zones. The crystals are distinctly developed and together create a vivid color contrast between yellow green and deep green.
Geology & Origin
Conichalcite is a basic copper arsenate that forms secondarily in the oxidation zone of copper and arsenic bearing deposits. Malachite is a basic copper carbonate and one of the most common secondary minerals in copper deposits. The Tsumeb Mine is world famous for its exceptional diversity of copper and arsenate minerals formed through complex weathering and redistribution processes. The paragenesis shown here reflects typical formation conditions within the oxidized zones of this unique polymetallic deposit.
This table is for general information and orientation, although the sizes of the stones may vary. In addition, this specification is handled differently from region to region.
| Sizes | Description | approx. Sizes in mm/cm | approx. Sizes in INCH | |
| Capsule | Capsule | 0.1–0.5 mm in a transparent hard capsule (approx. 1 cm) | capsule contents 0.1–0.5 mm | capsule contents 0.004–0.02 in |
| TN/mm | Micromount (TN = Thumbnail) | everything fitting in a TN Perky box or a MM box of approx. 1 in | approx. 0.5–2.5 cm | max. 1 in |
| Min | Miniature specimen | will not fit a TN or MM box anymore | approx. 2.5–5 cm | approx. 0.2–1.0 in |
| Scab | small cabinet specimen | approx. one-third to half a hand size | approx. 5–9 cm | approx. 1.0–2.0 in |
| Cab | cabinet specimen | full hand size | approx. 9–15 cm | approx. 2.0–3.5 in |
| large Cab | large cabinet specimen | approx. two hand sizes | approx. 15–30 cm | approx. 3.5–6.0 in |
| very large Cab | very large cabinet specimen | everything larger, no upper limit |
Abbreviations commonly used in mineralogy.
| Abbreviation | Meaning |
| xl | single crystal, possible with matrix |
| xls | noticeable crystals |
| (xl) | embedded or damaged |
| (xls) | embedded or damaged |
| MASS | massive and/or amorphous pieces |
| TYP | type locality of the original description |
| SWUV | shortwave-UV-reaction |
| UV | ultraviolet reaction |
| SC | self-collected |
| U | unique (single unique piece) |
Usage Instructions
This product is ideal as a collector's item, decorative element, teaching material, or for scientific and exhibition purposes.
Legal Notices
Safety
We accept no liability for damages resulting from improper and/or non-recommended use. Please carefully assess the suitability of the product before any alternative use.
Responsible Provider
Mikon Mineralienkontor GmbH
Steinslieth 11
D-37130 Gleichen OT Klein Lengden
Email: info@mikon-online.com
| shipment-weight, NOT netto weight (kg) | 0.080000 |
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