Hausmannite crystals; N’Chwaning Mine, Hotazel, South Africa; miniature specimen; unique piece
Hausmannite Crystals from the N’Chwaning Mine
The specimen shows a closely intergrown cluster of lustrous black to dark gray Hausmannite crystals. The crystals are angular and vary in size, with some faces reflecting a silvery sheen. Small orange-brown areas add color to the dark crystal formation.
Geology & Locality
Hausmannite is a manganese oxide with the formula Mn₃O₄. The N’Chwaning Mine lies in the Kalahari Manganese Field, where manganese ores occur in rocks of the Hotazel Formation. The ore deposits have undergone hydrothermal alteration.
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 cm | Approx. ¼–¾ in |
| Min | Miniature specimen | will not fit a TN or MM box anymore | approx. 2.5-5 cm | Approx. 1–2 in |
| Scab | small cabinet specimen | approx. one-third to half a hand size | approx. 5-9 cm | Approx. 2–3½ in |
| Cab | cabinet specimen | full hand size | approx. 9-15 cm | Approx. 3½–6 in |
| large Cab | large cabinet specimen | approx. two hand sizes | approx. 15-30 cm | Approx. 6–12 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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