Crocidolite xls; Wittenoom, Western Australia, Australia; Gerd Tremmel collection; Scab; unique piece
Crocidolite crystals from Wittenoom, Western Australia, Australia, Gerd Tremmel collection – small cabinet specimen as unique piece
This small cabinet specimen shows Crocidolite crystals from Wittenoom, Western Australia, Australia, from the Gerd Tremmel collection. The specimen displays a striking banded inclusion of parallel arranged, clearly developed Crocidolite crystals within a reddish brown and dark matrix. The fibrous crystals are distinctly formed and exhibit a silky to slightly metallic luster. In cross section, the typical fine parallel structure characteristic of Crocidolite becomes visible. The crystals form a compact yet strongly textured zone with pronounced linear structure and impressive optical effect.
Geology & Origin
Crocidolite is a fibrous variety of the amphibole group and belongs mineralogically to the riebeckite series. It forms in iron rich silicate rocks and is especially well known from the banded iron formations of Western Australia. In the Wittenoom region, such fibrous amphiboles occur in stratabound zones formed by metamorphic processes. The present specimen documents this typical layered development with clearly oriented crystal growth.
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 |
|---|