Earn more by selling at Catawiki's Diamond auction

Start selling now

With a worldwide audience, Catawiki is the perfect platform to sell your lots.

Just a few of the many lots included in our Diamond auction

0.32 Ct - Loose Diamond - Fancy Vivid Brown / VS1 / 3VG ** No Reserve **

$ 209

Diamond – 0.62 Fancy Vivid Brown / VS2 ** No Reserve **

$ 344

1.23 ct Brilliant cut diamond I I3 ****NO RESERVE****

$ 689

*Africa* Fancy diamond, 0.38 ct, I1, GIL

$ 148

About Catawiki & our auctions

Register for free and start selling to earn money safely and securely

  1. What is Catawiki

    Catawiki is the fastest growing online auction platform in the world. Our website connects international bidders who want to buy and sell unique and extraordinary objects.

  2. How our auctions work

    Starting each Friday, Catawiki hosts over 300 weekly auctions across 80 different categories from modern art to classic cars, from watches to jewellery and antiques.

  3. Our experts

    More than 170 experts curate and supervise our auctions, guaranteeing a varied selection of high quality lots.

  4. Type of objects

    Anyone with special objects, with an expected revenue of at least € 75, can easily offer them up for auction.

  1. 35,000+

    lots every week

  2. 174


  3. 15 million

    visitors every month

  4. 300+

    weekly auctions

How to sell through Catawiki

Sell your special objects in four simple steps

Start selling now

Worldwide selling potential for a small fee

It is always free to submit your lots, the fee will only be charged once your lot is sold

€ 0

Free listing



The commission fee for sellers is 12.5% of the winning bid, excluding VAT. Commission fees are used for extensively promoting our auctions. Your lots will be promoted in several ways: through online advertisements, social media, emails and print advertising, to name a few.

Why sell through Catawiki?

Experts, International sales market & Swift sales

  1. Experts

    Catawiki is one of the only online auction platforms in the world that works with a team of experts, who curate and supervise each and every auction. They are national and international specialists in their fields. All lots on our platform are assessed and valued by our experts.

  2. International sales market

    Every month, Catawiki sees millions of visitors from all over the world. Our platform is available in more than 15 languages including English, German, French, Dutch, Italian, Spanish, Chinese and Portuguese.

  3. Swift sales

    Catawiki auctions off over 35,000 objects every week in over 300 auctions. Since we have new auctions every week, you can sell your items very quickly. Catawiki has no limit in the amount of lots that you can offer up for auction at any one time.

Quotes from our sellers

We have more than 150,000 sellers across our 80+ categories

'Catawiki reaches exactly the right target audience I'm looking for. This is extremely beneficial for me. I started out small, but now I can live from the sales I make on Catawiki.'
Seller: Anything Else
'Spanish art is appreciated much more than we thought it would be abroad. We really had no idea about the international market until we joined Catawiki.'
Seller: El Testamento de Baron
The global stage that Catawiki provides is extremely attractive as it cuts out the astronomical costs associated with traditional auction houses and art galleries and helps me promote and sell my work on a large scale.'
Seller: HaydenKaysHQ

It’s time to sell to bidders from all over 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!