Arsenopyrite with Löllingite

Huanggang Fe-Sn deposit, Hexigten Banner, Chifeng City, Inner Mongolia, China
Ex. Dr. Stephen Smale
Small Cabinet, 8.7 x 7.8 x 5.6 cm
Start Time: 12/19/2024 7:30:00 pm (CST)
End Time: 01/04/2025 6:45:00 pm (CST)
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Starting Bid: $249
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Item Description

A beautiful combo specimen from this famous deposit in Inner Mongolia featuring attractive, razor-sharp, highly lustrous, silvery-white colored monoclinic crystals of Arsenopyrite measuring up to 7 mm, which are intermixed with "feathery" groups of thin, bladed, metallic grey colored Löllingite.  We found a few TINY soft pinkish colored, tetrahedral Helvine crystals on the piece as well, confirming that this specimen is certainly from the Huanggang Deposit, as the color is a perfect match. Arsenopyrite and Löllingite share some chemistry as Arsenopyrite is iron arsenic sulfide, and Löllingite is iron arsenide (no sulfur content), so it makes sense that they would form together, but these are still quite rare from this locality. Very little damage and quite attractive up close.
Ex Dr. Stephen Smale Collection. Along with amassing one of the finest private mineral collections in the world, Steve is a renowned mathematician. His accomplishments include being awarded the Fields Medal in 1966 along with being the awarded the Wolf Prize in mathematics in 2007. You can read Steve's bio on the Mineralogical Record website ( https://mineralogicalrecord.co... ) or on Wikipedia.

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