Cuproadamite, Gartrellite xls; Tsumeb Mine, Otavi Mountains, Namibia; Ilse Baer collection; TN; unique piece
Cuproadamite and Gartrellite crystals from the Tsumeb Mine, Otavi Mountains, Namibia, Ilse Baer collection– micromount as unique piece
This micromount specimen shows Cuproadamite and Gartrellite crystals from the Tsumeb Mine in Namibia and originates from the Ilse Baer collection. The piece was collected before 1972 and stands out with its vivid coloration and the attractive combination of both minerals.
The crystals display bright green to yellow green tones. They are finely developed and form a dense crystalline surface composed of many small well defined crystals. The crystals show a fresh luster and create a very lively and aesthetically appealing structure due to their dense growth.
Geology & Origin
Cuproadamite and Gartrellite are secondary arsenates forming in the oxidation zone of complex ore deposits. Both minerals develop through copper and zinc bearing solutions and often occur together in strongly oxidized environments.
The Tsumeb Mine in the Otavi Mountains is one of the most important mineral localities in the world. Its exceptional geochemical diversity has produced numerous rare secondary minerals with excellent crystal formation including high quality specimens from historic collections such as the Ilse Baer collection.
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) | embeddet 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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