Shannonite (xls); Grand Reef Mine, AZ, USA; Scab; unique piece
Embedded Shannonite crystals from the Grand Reef Mine, AZ, USA – small cabinet specimen as unique piece
This attractive small cabinet specimen from the famous Grand Reef Mine displays Shannonite in an iron-rich weathered matrix. The central part of the specimen hosts numerous small embedded crystals forming a sparkling crystalline surface that contrasts nicely with the reddish-brown to yellowish matrix. The crystals are visibly developed but are mostly embedded and closely intergrown with the host rock. The natural coloration and contrasting mineralized zones give the specimen an appealing and collectible appearance.
Geology & Origin
Shannonite is a rare lead carbonate hydroxide mineral that forms in the oxidized zones of lead- and copper-bearing ore deposits. The Grand Reef Mine in Arizona is one of the classic mineral localities of the American Southwest and is renowned for producing numerous rare secondary minerals. Weathering of primary sulfide ores resulted in the formation of a wide range of unusual oxidation minerals, including Shannonite. Due to its rarity and the limited number of known occurrences, the mineral is particularly sought after by collectors specializing in rare lead minerals.
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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