Braunite II xls; N'Chwaning Mine, Kuruman, South Africa; Min; unique piece
Braunite II crystals from the N'Chwaning Mine, Kuruman, South Africa – miniature specimen as unique piece
This miniature specimen features numerous lustrous Braunite II crystals on contrasting matrix from the famous N'Chwaning Mine in South Africa's Kalahari Manganese Field. The dark metallic to black crystals are well developed and form a dense crystal landscape with distinct faces and sharp crystal shapes. Particularly attractive are the numerous reddish brown associated crystals, which create an appealing color contrast with the dark Braunite. The crystals are clearly visible and give the specimen a highly aesthetic appearance.
Geology & Origin
Braunite II is a manganese-rich oxide mineral and one of the characteristic minerals of the exceptional manganese deposits of the Kalahari Manganese Field. The N'Chwaning Mine near Kuruman is regarded as one of the world's most important localities for rare manganese minerals and outstanding collector specimens. The mineralization formed under high-grade metamorphic conditions and produced a remarkable variety of rare and often exceptionally well-crystallized minerals. Braunite II from this locality is highly valued by collectors because of its crystal quality and its origin from a classic world-famous occurrence.
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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