Want to start selling at Catawiki’s diamond auction?

Catawiki auctions are supervised by professional auctioneers and attract millions of potential bidders from around the world.

Start selling now

About Catawiki's diamond auction

The height of glamour, elegance and sophistication, diamonds are constantly in demand from collectors, investors and buyers around the world. Diamonds are a naturally occurring material, formed under very specific conditions, these include the exposure of carbon-carrying materials to large quantities of pressure, at a temperature of between 900 and 1300 degrees Celsius. The value of diamonds is partially determined by “the four C’s” - clarity, carat, colour, and cut. The clarity of diamonds is determined by their grading according to one of several international grading systems. One such system was created by the Gemological Institute of America and rates diamonds on a sliding-scale of quality, with the lowest grade of diamond being I3 - Included and the highest grade being FL - Flawless.

Catawiki’s diamond auctions contain single stones and diamond items in a variety of colours, cuts, carats and gradings. Notable diamonds sold in Catawiki auctions include a 3.23 carat diamond for £21,643 and a platinum Art Deco style diamond bracelet set, with a total of 20 ct diamonds, which sold for £17,635. Whether you have a single diamond or a splendid piece of diamond jewellery to sell, Catawiki’s diamond auctions are the best place to sell your special diamonds and diamond objects. Our expert auctioneers supervise our auctions, while our notary officials work to guarantee the validity of bids placed. Once your item has sold, our secure payment system makes sure that you and your buyer are completely satisfied.

Catawiki is the ideal marketplace for your special diamond objects - start selling today!

How to sell through Catawiki

  1. 1. Seller registration

    Register for seller privileges free of charge. You can offer up as many objects as you wish with a minimum estimated value of 75 euro.

  2. 2. Submit items

    Once your items and descriptions have been approved by our auctioneers, they are scheduled for auction.

  3. 3. The thrill of auction

    Experience the excitement as bidders from all over the world place their bids on your submitted items!

  4. 4. Make money safely

    You won’t be asked to ship your items until the buyer has transferred payment. Catawiki manages payments between buyers and sellers.

The advantages of Catawiki’s auctions

  • High revenues

  • Swift sales

  • Secure payment format

  • International bidding audience

  • Auctioneer supervision

  • Optional reserve price for expensive items

  • Professional customer service

  • User friendly

Start selling now


Welcome back! Whilst you were away we added the functionality to view auctions and bid in pounds.