Bournonite (classic material) (ex Kay Robertson Collection)

Georg Mine, Willroth, Altenkirchen, Wied Iron Spar District, Westerwald, Rhineland-Palatinate, Germany
Small Cabinet, 9.2 x 9.0 x 3.1 cm
Start Time: 07/23/2020 8:45:00 pm (CDT)
End Time: 07/30/2020 6:45:00 pm (CDT)
Auction Closed
Winning Bid: $50
View Closed Auction Set

Item Description

Bournonite specimens from this ancient iron mine, abandoned in 1965, are German classics. Semi-"cogwheel"-shaped, dark metallic-gray, Bournonite crystals are sitting on the underlying matrix associated with compressed rhombohedra of golden-brown Siderite. The crystals reach about 1.8 cm, with some well-formed smooth faces on the "backs" of the crystals. Some crystals are not complete, but overall it's a good near full cabinet sized specimen of this desirable and seldom seen material dating back over 50 years at least! Ex Kay Robertson Collection (#2450). Kay is a prominent California collector, who specialized in European classics (see the article in the March-April, 2007 Mineralogical Record and the 50+ page article in the German Magazine "Mineralien Welt" November-December 2017).

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Bidding History

Bid Amount Bid Time
$50 07/30/2020 6:20:09 pm (CDT)
$45 07/30/2020 5:12:49 pm (CDT)
$40 07/30/2020 5:12:49 pm (CDT)
$20 07/29/2020 5:35:07 am (CDT)
$15 07/28/2020 12:12:42 am (CDT)
$10 07/27/2020 2:43:20 pm (CDT)