Mimetesite, Dolomite, Cerussite xls; Tsumeb Mine, Otavi Mountains, Namibia; Ilse Baer collection; TN; unique piece
Mimetesite, Dolomite and Cerussite crystals from the Tsumeb Mine, Otavi Mountains, Namibia, Ilse Baer collection – micromount as unique piece
This micromount specimen shows Mimetesite, Dolomite and Cerussite crystals from 1972 from the Tsumeb Mine, Otavi Mountains, Namibia, from the Ilse Baer collection. Within a small cavity, a dense white to cream colored Dolomite crust of finely developed crystals is present, on which yellow Mimetesite crystals have formed as small but clearly recognizable individuals. Transparent to slightly brownish Cerussite crystals with well defined crystal shape are also visible. The crystals are distinctly developed and form an attractive paragenesis with appealing color contrast between white, yellow and the darker matrix areas.
Geology & Origin
Mimetesite is a lead arsenate belonging to the apatite group and forms secondarily in the oxidation zone of lead rich deposits. Cerussite is a lead carbonate and one of the most important secondary minerals in lead zinc deposits. Dolomite occurs as a carbonate associated mineral. The Tsumeb Mine is world famous for its exceptional diversity of lead, zinc and arsenate minerals formed through complex weathering processes in the oxidized zone of this polymetallic deposit. The paragenesis shown here reflects typical formation conditions of this unique locality.
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 |
|---|