Malachite xls; Katanga, Congo; Gerd Tremmel collection; Scab; unique piece
Malachite crystals from Katanga, Congo, Gerd Tremmel collection – Scab as unique piece
This small cabinet specimen features Malachite from the Katanga region, Congo, from the Gerd Tremmel collection. The specimen displays an intense green color range, varying from deep emerald to lighter, slightly bluish green tones. The surface is irregular and richly textured, showing knobby to crusty areas that are locally interspersed with lighter, contrasting mineral zones. The strong coloration combined with the complex surface structure gives the specimen a very expressive and characteristic appearance typical for Malachite from this classic copper district.
Geology & origin
Malachite is a secondary copper carbonate that forms in the oxidation zones of copper deposits. The deposits of the Katanga region are among the most important copper occurrences worldwide and are renowned for their wide variety of secondary copper minerals. Malachite forms here through the alteration of primary copper sulfides under the influence of oxygen- and carbonate-rich solutions. This specimen originates from the Gerd Tremmel collection and represents characteristic material from this world-famous 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) | 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) | 0.100000 |
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