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 a world famous locality for rare sulfosalts and presents a particularly aesthetic combination of matrix and embedded crystals.
The Dufrenoysite crystals are clearly visible and show an elongated prismatic habit with well defined crystal faces. They are set in strong contrast within a light colored fine crystalline matrix, making the individual crystal stand out prominently. The surface appears partly slightly metallic and gives the specimen an elegant appearance.
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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