Beudantite xls; Tsumeb Mine, Otavi Mountains, Namibia; Ilse Baer collection; TN; unique piece
Beudantite crystals from the Tsumeb Mine, Otavi Mountains, Namibia, Ilse Baer collection – micromount as unique piece
This micromount specimen with Beudantite crystals from the Tsumeb Mine, Otavi Mountains, Namibia, from the Ilse Baer collection shows small well recognizable crystals on a dark oxidized matrix. The crystals occur in small groups on the surface and stand out clearly from the darker host rock through their lighter color and luster. The compact specimen displays a typical formation of secondary mineralization from the oxidation zone of the deposit.
The origin from the world famous Tsumeb Mine together with the historical provenance from the Ilse Baer collection adds additional collector value to this micromount. The specimen represents a classic association from one of the most important mineral localities in the world.
This micromount specimen dates from before 1972.
Geology & Origin
Beudantite is a lead iron arsenate sulfate hydroxide belonging to the alunite supergroup. The mineral forms secondarily in the oxidation zone of polymetallic ore deposits through complex chemical alteration processes of arsenic and sulfur bearing ores. The Tsumeb Mine in Namibia is famous for its extraordinary diversity of rare secondary minerals and is regarded as one of the most important classic mineral localities worldwide.
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) | 0.050000 |
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