Hausmannite, Brucite xls; N'Chwaning II Mine, Kalahari Manganese Field, South Africa; TN; unique piece
Hausmannite and Brucite crystals from the N'Chwaning II Mine, Kalahari Manganese Field, South Africa – micromount as unique piece
This micromount specimen with Hausmannite and Brucite crystals from the N'Chwaning II Mine, Kalahari Manganese Field, South Africa shows an attractive association of two characteristic minerals from this deposit. Numerous deep black Hausmannite crystals with a strong metallic luster are developed on a light colored matrix.
The Hausmannite crystals form dense, lustrous crystal groups with well developed crystal faces. In close association, pale Brucite crystals are present, creating a strong color contrast with the dark Hausmannite crystals and enhancing the overall visual appeal of the specimen. The combination of these two minerals is typical for the complex mineral paragenesis of the N'Chwaning II Mine.
Geology & Origin
The N'Chwaning II Mine in the Kalahari Manganese Field is one of the most important localities worldwide for rare manganese minerals. The deposits formed in manganese rich sedimentary rocks that were later modified by metamorphic and hydrothermal processes. Within this complex geochemical environment numerous rare oxides, silicates and hydroxides developed. Hausmannite is one of the typical manganese oxides from this deposit, while Brucite, a magnesium hydroxide, can occur in various paragenetic 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) | 0.050000 |
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