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 clearly recognizable, parallel fibrous Crocidolite crystals running in undulating layers through the rock. The bluish shimmering fiber bundles contrast impressively with the dark fine grained matrix and create a characteristic silky texture. The crystals are clearly developed and show the typical longitudinal fibrous structure of this mineral, giving the piece a distinctive banded appearance.
Geology & Origin
Crocidolite is the asbestiform variety of the amphibole Riebeckite and forms in metamorphosed banded iron formations. At Wittenoom it occurs within banded iron formations where it developed through regional metamorphism of iron and sodium rich precursor rocks. The parallel fibrous aggregates document directed crystallization under pressure and temperature conditions during metamorphism. Wittenoom is a globally known locality for Crocidolite in banded iron formations.
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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