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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
2.16 Barbosa Feb 16 2:00 PM Feb 21 6:20 PM
2.22 Barbosa Fresh from Tucson I Feb 22 8:00 AM Feb 28 6:20 PM
2.29 Barbosa Fresh from Tucson II Feb 29 10:00 AM Mar 6 6:20 PM
3.07 Barbosa Fresh from Tucson III Mar 7 10:00 AM Mar 13 6:20 PM

Marin Minerals Auction
OpensStarts to Close
Marin Minerals Auction #920 Feb 16 8:00 AM Feb 22 6:30 PM
Marin Minerals Auction #921 Feb 23 8:00 AM Feb 29 6:30 PM
Marin Minerals Auction #922 Mar 1 8:00 AM Mar 8 6:30 PM
Marin Minerals Auction #923 Mar 8 4:00 PM Mar 15 1:30 AM
Marin Minerals Auction #924 Mar 15 3:00 PM Mar 22 1:30 AM

Dealer's Choice Auction
OpensStarts to Close
02.14 DC Feb 14 10:00 AM Feb 20 5:00 PM
2.21 DC Feb 21 10:00 AM Feb 27 5:00 PM
2.28 DC Feb 28 10:00 AM Mar 5 5:00 PM
3.06 DC Mar 6 10:00 AM Mar 12 5:00 PM
3.13 DC Mar 13 10:00 AM Mar 19 5:00 PM

Special Auction
OpensStarts to Close
van Dieren Self Collected Canadian Minerals Feb 26 10:00 AM Mar 3 5:00 PM

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