Zincgartrellite, Cuproadamite xls; Tsumeb Mine, Otavi Mountains, Namibia; Ilse Baer collection; Min; unique piece
Zincgartrellite and Cuproadamite crystals from the Tsumeb Mine, Otavi Mountains, Namibia, Ilse Baer collection – miniature specimen as unique piece
This miniature specimen from for 1972 shows Zincgartrellite and Cuproadamite crystals from the Tsumeb Mine in Namibia and originates from the Ilse Baer collection. The piece stands out with its complex and color rich surface and the characteristic association of secondary arsenate minerals from this famous locality.
Zincgartrellite forms fine crystalline to crusty aggregates in dark green to olive tones covering large parts of the matrix. In combination Cuproadamite occurs in greenish to slightly bluish shades appearing as crystalline coatings and small aggregates. The crystals are clearly recognizable and together create a multi layered structure with fine details and attractive color contrasts.
Geology & Origin
Zincgartrellite and Cuproadamite belong to the group of secondary arsenate minerals forming in the oxidation zone of complex polymetallic deposits. Their formation is closely linked to the alteration of primary ore minerals under oxidizing conditions.
The Tsumeb Mine in the Otavi Mountains is one of the most important mineral localities in the world especially known for its diversity of secondary minerals. The exceptionally complex geochemical environment of this deposit led to the formation of numerous rare mineral species often occurring in characteristic and aesthetically appealing associations.
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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