Halotrichite, Botryogen, crystals; Falun Mine, Sweden; cabinet specimen; unique piece
Botryogen and Halotrichite crystals from Falun Mine, Sweden – cabinet specimen as a unique piece
This approximately 10 cm cabinet specimen shows orange-red Botryogen crystals accompanied by whitish to pale yellow-green Halotrichite crystals. The fine, hair- to needle-like Halotrichite aggregates form delicate coatings in places over the more strongly colored areas. The result is a clear contrast between the lustrous warm red tones and the pale, silky sections.
Geology & Origin
The Falun Mine lies in Sweden’s Bergslagen ore district and is the type locality for Botryogen. The ore deposit occurs in a strongly altered volcanic rock complex, with pyrite as an important ore mineral. Oxidation and weathering of sulphide ores can produce secondary sulphate minerals, including the two species found together here.
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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