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Four stones from our Antwerp inventory, shown to scale.

Honest valuations, top market value and fully insured shipping, from the heart of Antwerp’s diamond district.

We buy diamonds, coloured stones, watches, antique and designer jewellery. Every piece is assessed by certified gemmologists, and you get a clear offer with no obligation.

Step 1 of 6

  1. Submit your piece

    Send photos and details online. It takes a few minutes.

  2. Expert review

    Our gemmologists assess it against current market prices.

  3. Receive an offer

    You get a clear offer, with no obligation.

  4. Accept and send

    We arrange a free, fully insured FedEx or DHL pickup.

  5. Inspection

    We verify your piece when it arrives in Antwerp.

  6. Fast payment

    Once confirmed, the payment goes straight to your account.

Start here and we’ll take you to the full valuation form with your answers filled in.

Diamonds from our current inventory in Antwerp.

  • Asscher 7.79 ct

    Asscher 7.79 ct

    Colour
    Fancy Vivid Yellow Even
    Clarity
    VVS1
    Lab
    GIA

    $599,836

  • Round 12.38 ct

    Round 12.38 ct

    Colour
    E
    Clarity
    SI1
    Cut
    Excellent
    Lab
    GIA

    $382,702

  • Round 7.01 ct

    Round 7.01 ct

    Colour
    H
    Clarity
    VS2
    Cut
    Excellent
    Lab
    GIA

    $167,907

  • Radiant 10.0 ct

    Radiant 10.0 ct

    Colour
    Fancy Yellow
    Clarity
    VS1
    Lab
    GIA

    $148,510

  • Emerald 10.07 ct

    Emerald 10.07 ct

    Colour
    Fancy Deep Yellow Brownish-Greenish
    Clarity
    VS1
    Lab
    GIA

    $99,582

  • Radiant 7.17 ct

    Radiant 7.17 ct

    Colour
    Fancy Yellow
    Clarity
    VS1
    Lab
    GIA

    $82,816

  • Pear 3.08 ct

    Pear 3.08 ct

    Colour
    D
    Clarity
    FL
    Lab
    GIA

    $78,263

  • Pear 3.01 ct

    Pear 3.01 ct

    Colour
    D
    Clarity
    FL
    Lab
    GIA

    $76,484

  • Round 3.02 ct

    Round 3.02 ct

    Colour
    D
    Clarity
    VS1
    Cut
    Excellent
    Lab
    GIA

    $63,949

Promise Cushion-Cut Yellow Diamond Ring (18k Gold or Platinum)

Sothis Diamonds is a family business in Antwerp, specialising in diamonds, pearls, vintage pieces and coloured gemstones.

We buy and sell with integrity, and we give new life to old jewellery through refurbishment and reuse.

About us

  1. Certified gemmologists

    Decades of experience behind every valuation.

  2. Free, transparent valuations

    You see how we reach our offer.

  3. Top market offers

    No middlemen and no commission.

  4. Insured pickup

    Free FedEx or DHL collection, fully insured.

  5. Fast from start to finish

    Quick valuations and quick payment.

  6. Certified stones for sale

    Authentic diamonds and jewellery with their papers.

Gems of praise

“Good and straightforward service if you want to sell or buy a good gem. Highly recommended.”
Mako Franz

Recent stones from our collection.

Exclusive offers and diamond news

New stones and offers, a few times a year.