Heinrichite xls; Wittichen, Black Forest, Germany; Gerd Tremmel collection; Scab; unique piece
Heinrichite crystals from Wittichen, Black Forest, Germany, Gerd Tremmel collection – small cabinet specimen as unique piece
This small cabinet specimen with Heinrichite crystals from Wittichen, Black Forest, Germany, originates from the Gerd Tremmel collection and represents a typical example of this rare uranium mineral. The crystals occur as fine coatings and aggregates in characteristic green to yellow green tones, irregularly distributed across the matrix.
The crystals are only partly well developed and mostly appear as fine grained to crusty coatings, creating a vivid and color rich surface. The matrix itself shows a complex structure with multiple mineral phases reflecting the geological environment of formation. Despite their rather delicate development, the Heinrichite crystals are clearly recognizable and give the specimen its distinctive appearance.
Geology & Origin
Wittichen in the Black Forest is a classic locality for uranium minerals in Germany. The mineralization is related to hydrothermal processes in which uranium bearing solutions penetrated fractures and cavities, forming secondary uranium minerals such as Heinrichite. Heinrichite is a rare arsenate of the uranyl mica group and typically forms under oxidizing conditions in the weathering zone of primary uranium deposits.
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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