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Luciana Barbosa

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Welcome to!

To register to bid, click the link on the left.

This site offers multiple auctions, to give you a wider range of bidding opportunities.

Some of the auctions include listings from multiple dealers; Others, such as Marin Mineral Auctions and the Barbosa Auctions, are dedicated to listings from those dealers.

The Special Auction is used for occasions such as a benefit auction, an auction or series of auctions related to a specific show such as the Tucson Show, or a single dealer's selection of minerals.

The Dealer's Choice Auction is offered once per week.

All of the auctions use an optional proxy bidding system.

Should you encounter a problem using the site, please send an email to

This website, created by John Veevaert, was one of the first of its kind on the the world wide web.

Thank you!,

Luciana Barbosa



Recent and Upcoming Auctions

All times are PDT/PST - Pacific Time Zone (USA)
Click on the hyperlinked link to get to the auction of interest

The current auction on each site is highlighted in green

Barbosa Auction
OpensStarts to Close
11.16 Barbosa Nov 16 10:00 AM Nov 22 6:20 PM
11.23 Barbosa Nov 23 10:00 AM Nov 29 6:20 PM
11.30 Barbosa Nov 30 10:00 AM Dec 6 6:20 PM
12.08 Barbosa Dec 7 10:00 AM Dec 13 6:20 PM

Marin Minerals Auction
OpensStarts to Close
Marin Minerals Auction #907 Nov 17 8:00 AM Nov 23 6:30 PM
Marin Minerals Auction #908 Nov 24 8:45 AM Nov 30 6:30 PM
Marin Minerals Auction #909 Dec 1 8:00 AM Dec 7 6:30 PM
Marin Minerals Auction #910 Dec 8 8:00 AM Dec 14 6:30 PM

Dealer's Choice Auction
OpensStarts to Close
11.15 DC Nov 15 10:00 AM Nov 21 5:00 PM
11.22 DC Nov 22 10:00 AM Nov 28 5:00 PM
11.29 DC Nov 29 10:00 AM Dec 5 5:00 PM
12.06 DC Dec 6 10:00 AM Dec 12 5:00 PM
12.13 DC Dec 13 10:00 AM Dec 19 5:00 PM

Special Auction
OpensStarts to Close
High Value Special Auction Nov 20 10:00 AM Nov 27 5:00 PM

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