Copper (classic USA locality)

New Cornelia Mine, Ajo, Pima Co., Arizona, USA
Cabinet, 10.7 x 6.0 x 1.5 cm
Start Time: 04/01/2021 7:00:00 pm (CDT)
End Time: 04/17/2021 6:00:00 pm (CDT)
Auction Closed
Winning Bid: $240

Item Description

This item is part of a special benefit auction for the Rice Museum of Rocks & Minerals (ricenorthwestmuseum.org). Items are either deaccessions from the museum's collection or were donated by generous supporters listed below.

Auction open April 1, 2021 through April 17, 2021.

Billing for this auction will occur on Monday, April 19, for payment using PayPal or credit card. Shipping will be billed at cost, or please contact brandy@mineralauctions.com if you'd like to plan on picking up items at future shows or during a stop through Dallas.


This very aesthetic, arborescent floater of Native Copper from the New Cornelia pit in Arizona, where most copper specimens are obviously destroyed for the primary purpose of operating the mine - to extract copper. The copper mines of Arizona have produced some very good Native Copper specimens sporadically over the decades of mining in the state, but great pieces like this are few and far between. This Copper is superbly crystallized with modified dodecahedrons to 0.5 cm across arranged in a very aesthetic arborescent form with several "branches" of crystals in arcuate arrangements. The entire piece is a very bright copper-orange with a metallic luster that is satiny in places. This is a very elegant Ajo, Arizona Copper.

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Bidding History

Bid Amount Bid Time
$240 04/17/2021 4:18:06 pm (CDT)
$230 * 04/17/2021 4:17:49 pm (CDT)
$230 * 04/17/2021 4:17:49 pm (CDT)
$220 04/12/2021 7:50:24 pm (CDT)
$210 04/12/2021 7:50:24 pm (CDT)
$188 04/09/2021 9:17:42 am (CDT)
$178 04/09/2021 9:17:42 am (CDT)
$110 04/08/2021 9:05:42 pm (CDT)
$100 04/01/2021 7:10:03 pm (CDT)
* Proxy Bid Battle: In the event of two customers inputting matching proxy bids, the leading bid goes to the earliest of the two proxy bids. Tie winners are shown in bold.