bb: Marialite, Orthoclase. - Bright Yellow Fluorescent from Afghanistan!

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:
Marialite, Orthoclase
Locality:
Ladjuar Medam, Sar-e Sang, Koksha Valley, Badakhshan, Afghanistan
Size:
Miniature - 3.9 x 2.7 x 1.1 cm
Weight:
11.9 g (59.5 ct)
Number:
2454
Details:
This specimen, from the ancient lapis lazuli diggings in Afghanistan,
has a small crystal of
bright yellow-fluorescent marialite, partly altered on the surface to unusual blue orthoclase feldspar
. The marialite has a bright, saturated butter-yellow glow under longwave and a more restrained yellow under shortwave. The orthoclase doesn't really glow under longwave, but it shows up nicely because the really thin coating gets backlit by the glow from the marialite, making an attractive complement. It does seem to fluoresce blue under shortwave, much brighter than the marialite.
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:
* US Post Office policy can make economical shipping a challenge. Price increments for packages are as follows:
First class up to 225 g, then 225-900 g, then 900-1350 g (Canada only).
Higher weights require Priority Mail.
I always try to make shipping as cost-effective as possible. Please send a message so we can work things out.
* 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.