Quartz var: Chalcedony pseudomorph after Aragonite

Casa Grande Mining Dist., Pinal Co., Arizona, USA
Ex. Bob Reynolds
Cabinet, 9.7 x 4.6 x 4.5 cm
Start Time: 09/21/2023 6:45:00 pm (CDT)
End Time: 09/28/2023 6:45:00 pm (CDT)
Auction Closed
Winning Bid: $15
View Closed Auction Set

Item Description

An odd specimen labeled as coming from Casa Grande (no specific mine, so it might have just been found on the surface) featuring a translucent layer of very soft silvery lilac colored Chalcedony which has pseudomorphed after Aragonite on matrix. I've never seen a piece quite like this before, and it's certainly what I would call a "mineral oddity".
From the collection of Robert (Bob) Reynolds, and there is a number from the Kay Robertson Collection glued to the bottom (#Kia - 1015) Bob was a well-known fossil and mineral expert and former Curator of Earth Sciences at the San Bernardino County Museum in California. The rare phyllomanganate-chromate species Reynoldsite was named in his honor in 2011.

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Bidding History

Bid Amount Bid Time
$15 09/28/2023 4:48:37 pm (CDT)
$10 09/21/2023 9:29:22 pm (CDT)