Duftite xls; Clara Mine, Oberwolfach, Germany; Gerd Tremmel collection; Scab; unique piece
Duftite crystals from the Clara Mine, Oberwolfach, Germany, Gerd Tremmel collection– small cabinet specimen as unique piece
This small cabinet specimen shows Duftite crystals from the Clara Mine, Oberwolfach, Germany, from the Gerd Tremmel collection. Numerous dark green Duftite crystals occur on a light, partly whitish to slightly reddish matrix in velvety, fine crystalline coatings and dense aggregates. The crystals form flat coverings as well as slightly raised granular areas with matte to weakly silky luster. The intense green color contrasts strongly with the light matrix and gives the specimen a distinctive and mineralogically typical appearance. The crystals are clearly developed and dominate the overall character of the piece.
Geology & Origin
Duftite is a basic lead copper arsenate belonging to the adelite group and forms secondarily in the oxidation zone of polymetallic deposits. At the Clara Mine it develops through the alteration of primary lead and copper minerals under oxidizing conditions in arsenic bearing solutions. The Clara Mine in the Black Forest is one of the most important mineral localities in Germany and is internationally known for its wide diversity of secondary minerals. The Duftite crystals shown here document the complex geochemical processes within the oxidized ore zones of this classic deposit.
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) | 0.100000 |
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