Dufrenoysite xls; Lengenbach Mine, Binntal, Switzerland; TN; unique piece
Dufrenoysite crystals from the Lengenbach Mine, Binntal, Switzerland – micromount as unique piece
This micromount specimen shows Dufrenoysite crystals from the Lengenbach Mine, Binntal, Switzerland. The piece comes from one of the world’s most important localities for rare sulfosalts and displays a typical habit of this mineral.
The Dufrenoysite crystals are visible and form fine grained to compact crystalline aggregates with a slightly metallic luster. The crystals are mostly small and densely intergrown, creating a uniform and subtly sparkling surface. Individual crystal areas can still be distinguished and contribute to the aesthetic appeal of the specimen.
Geology & Origin
Dufrenoysite is a rare lead arsenic sulfosalt belonging to the group of complex sulfide minerals. It forms in hydrothermal deposits, often in carbonate host rocks under specific chemical conditions.
The Lengenbach Mine in Binntal is world famous for its exceptional diversity of rare sulfosalts. The unique geology of this deposit has produced numerous rare mineral species, including well developed Dufrenoysite crystals.
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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