bb: RARE FL Witherite from Obscure English Locality - Classic!

Description

NOTE:
Postal delays caused by the pandemic are affecting
delivery of parcels. In the USA, most delays are minimal. Shipping to other countries is currently taking at least several days to a week or more longer than usual. Please keep this in mind while bidding.
Species:
Witherite, Calcite
Locality:
Apedale Mine - Main Vein, Whitterside Moor, Swaledale, North Yorkshire, England, UK
Size:
Small cabinet - 5.8 x 4.3 x 3.7 cm
Weight:
174.0 g
Number:
2462
Details:
Here is a true rarity, a good-sized cleavage chunk of solid English witherite from a locality so obscure it's not even listed on Mindat.org. It is a translucent pale yellow in daylight. Under longwave UV, it fluoresces a fairly bright, cloudy lemon-pudding yellow. The shortwave response is a deeper, clearer yellow; there is no appreciable phosphorescence. A small section of fibrous white calcite (or barytocalcite?) is attached to the polycrystalline surface. After a little online research, I found a site that revealed the Apedale was operated for lead and closed around 1884. I obtained a very small lot of this material from an English source.
NOTE: TO VIEW FLUORESCENCE, YOU NEED A QUALITY ULTRAVIOLET LIGHT WITH A UV FILTER!
The better the UV source, the better fluorescent minerals look. Cheap "UV" flashlights without filters will not provide satisfactory results!
The photos here are taken using
Convoy S2 and C8 (longwave-365)
and UV Systems SuperBright II (shortwave-254) lamps, metered
and exposed to show fluorescent response to best advantage.
Key factors include lamp wattage, UV spectrum and filtration, as well as distance from lamp to specimen. For best results with any UV source, observe against a dark, non-fluorescent, non-reflective background, in complete darkness with eyes adapted. For extended viewing, use protective UV-absorbing goggles.
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INTERNATIONAL CUSTOMERS:
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Higher weights require Priority Mail.
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* Please note that import duties, taxes or charges are not included in the item price or shipping fees and are the
buyer’s
responsibility.
While most countries do not charge duty on mineral specimens, you should check in
your own co
untry to be sure before bidding.