All jewellery submissions are carefully reviewed by our experts to ensure they meet our quality and value standards. Follow these guidelines to maximise your chances of a successful sale.

What we accept

At Catawiki, we auction:

• New Jewellery (newly produced with a minimum retail value of €200)

• Pre-Owned Jewellery (from early 2000s with a minimum value of €100)

• Antique Jewellery (before 1930s with a minimum value of €100)

• Vintage Jewellery (up to late 1990s with a minimum value of €100)

• Brand Jewellery (all periods with a minimum value of €100)

To be accepted, your object must:

• Be professionally manufacturedwith a high degree of craftsmanship:
  • Refined professional finish
  • Skillful execution of the design
  • Lasting construction
• Be made with precious metals and stones meeting material quality guidelines
• For pieces with diamond or gemstones estimated above €5,000, a certificate is mandatory. A report for the centre stone is sufficient unless the piece features both a centre stone and side stones totaling over 1 ct, in which case a full jewellery report covering all stones is required.
• Be compliant with ethical sourcing expectations: 
  • Jewellery with diamonds must comply with the Kimberley Process
  • CITES regulations apply to coral and other organic materials
• Not have a reserve price if valued below €300

Additional requirements for brand jewellery

Jewellery listed as brand jewellery must meet all general criteria above, plus the following:

• Be made by an internationally recognised modern or vintage jewellery brand
• The brand must have an established history and reputation in the jewellery industry
• The piece must be signed with a registered trademark
• The brand must have strong distribution presence in Europe or worldwide (online and/or offline)
• Be in new or pre-owned condition

What increases your chances of approval:

• Jewellery from reputable brands:
  • Antique and vintage brands: Fouquet, Elizabeth Gage, Garrard, Georg Jensen, Kutchinsky, Ilias Lalaounis, Lapponia, René Lalique, Georges Pierre, Charles Rennie Mackintosh, Seaman Schepps, Sterlé, Tiffany (vintage pieces)
  • Modern brands: Alfieri St John, Belperron, Boucheron, Buccellati, Bucherer, Bvlgari, Carrera y Carrera, Cartier, Chanel, Chantecler, Chaumet, Chimento, Chopard, Comete, Crivelli, Damiani, David Webb, David Yurman, De Beers, De Grisogono, Dinh Van, Dior, Fope, Fred, Giorgio Visconti, Graff, Gucci, H. Stern, Harry Winston, Hermès, Louis Vuitton, Mauboussin, Messika, Mikimoto, OJ Perrin, Otto Jakob, Pasquale Bruni, Patek Philippe, Piaget, Poiray, Pomellato, Recarlo, René Boivin, Repossi, Roberto Coin, Salvini, Tamara Comolli, Theo Fennell, Theodor Fahrner, Tiffany (modern pieces), Van Cleef & Arpels, Van der Bauwede, Verdura, Vhernier, Wempe
• Jewellery accompanied by a laboratory report, as this significantly increases buyer trust and the likelihood of a successful sale.
• Premium quality jewellery with unique designs & exceptional craftsmanship

📌 Examples of accepted objects:

Material quality guidelines

Each object needs to meet the following material quality guidelines to be accepted on our platform. 

Precious metals

• New Jewellery: Must be newly manufactured, not re-polished or re-conditioned.
• Pre-Owned & Antique/Vintage: No restrictions on age or previous use, but must be authentic and in line with historical or second-hand character.
• All jewellery must be officially hallmarked or professionally tested. Antique & Vintage pieces may include a statement of fineness if testing isn't possible.

We accept the following metals:

Minimum weights (where applicable):

Diamonds

To maintain a trustworthy marketplace, we ask sellers to guarantee the provenance of diamonds in jewellery (in a new condition) and confirm they are not from conflict zones or banned countries. All diamonds listed must comply with the Kimberley Process, which helps prevent the trade of conflict diamonds and ensures they come from conflict-free areas.

• Natural colourless diamonds:

  • Clarity: Up to I1/I2 (as long as inclusions do not affect aesthetics or durability)
  • Shape & Cutting Style: Round and fancy cuts. Old or rose cuts only accepted in Antique & Vintage Auctions 
  • Colour: D to Z.
  • Carat: All sizes accepted.
  • No simulants or broken/ damaged diamonds
  • If no laboratory report is submitted, clarity/colour/cut cannot be specified → assessed at flat price per carat.

• Natural coloured diamonds:

  • Clarity: all grades, as long as inclusions do not deter colour and / or durability.
  • Shape & Cutting Style: Round and fancy. Special cuts will be reviewed by experts.
  • Colour: all colours indicating main fancy colour, intensity and overtone.
  • Carat weight: All sizes accepted.
  • Lab report: Always required for correct colour grading.
  • No simulants or broken/ damaged diamonds

• Lab-grown diamonds:

  • Clarity: Min VS2
  • Colourless Grade: D to F
  • Cut: Any shape & cutting style 
  • Carat weight:
    • Minimum 1ct total weight
    • Between 1ct - 2ct: only lots without Reserve Price and without expert estimate. 
  • Lab report: Full jewellery report or only main stone always required. Side stones accepted without lab report up to 0.99 total carat weight. 

Gemstones

All gemstones must be in good condition — no chips, broken pieces, or abraded facets. Treatments must be clearly disclosed in both the description and certificate.

Accepted gemstones:

• Natural & high quality gemstones: Sapphire, Ruby, Emerald, Aquamarine, Tanzanite, etc
• Lab-grown diamonds are accepted only when accompanied by a laboratory certificate declaring them as such and submitted in the dedicated lab grown diamond jewellery auction
• Synthetic stones (excluding lab grown diamonds & simulants) are allowed only for antique/vintage items when historically accurate

Gemstone cuts and clarity:

Treatment guidelines:

Organic materials

We accept jewellery featuring the following organic and biogenic materials:

• Coral: Only species compliant with current CITES regulations are permitted.
• Mother-of-pearl: Allowed as an accent only, not factored into the piece's valuation.
• Pearls: Accepted under specific conditions (see below)
  • Type: Only cultivated saltwater pearls of high quality (e.g. Akoya, Tahitian, South Sea).
  • Colours: Must be natural – no dyed pearls.
  • Condition: Only pristine pearls accepted; those with blurry reflection, spots, marks or low nacre quality will be rejected.
  • Treatments: No colour treatments allowed. Chocolate Tahitian pearls may be considered.
  • Natural Saltwater Pearls: Accepted only with a valid lab report from approved laboratories.

Restrictions:

• The following materials are not accepted: Amber, ivory, ebony, tortoiseshell.
• Bamboo coral and Apple coral are also excluded due to low quality and oversupply.
• Freshwater pearls: Only accepted when combined with gold and/or high-value natural gemstones.
• Metal parts: Gold-plated fittings are not accepted. High-quality silver fittings may be allowed.
• Imitation pearls: Not accepted.

What we do not accept

To keep our auctions high-quality and trustworthy, we do not accept:

• Jewellery made of non-precious metals; gold plated silver is only accepted in the dedicated Silver Jewellery Auction
• Pieces with poor or hobbyist craftsmanship
• Objects in poor condition, visibly worn, or damaged
• Jewellery sets with:
  • Lab-grown diamonds listed as natural
  • Synthetic gemstones or simulants (unless antique & period correct)
  • Treated opals, dyed gemstones, or reconstituted stones
• Fashion jewellery or commercial costume items (i.e. Swarovski)
• Items with estimated diamonds or gemstones value above €5,000 without certification
  
  

📌 Examples of rejected objects:

Getting your submission ready

1. Set a competitive reserve price

Note: Jewellery with an estimated value below €300 can only be listed without a reserve price. 

Catawiki experts carefully curate all jewellery submissions to ensure they match the advertised quality. If a reserve price is set for pieces above €300, they also ensure it reflects a fair market value. 

Experts may request to lower or remove the reserve price when:

• The original reserve price is unlikely to result in a sale, based on past auction data, current market value and trends.
• The object has remained unsold after multiple auctions.

2. Fill in all the details and write a clear description

When you submit an object, use the dedicated fields to provide the right information, e.g. metal fineness and weight, gemstones type, weight, cut, clarity, colour, treatment, presence of certificates, brand signatures, hallmarks, serial numbers, ring/bracelet/necklace sizes in mm/cm, condition, etc. These fields ensure your listing is clear, searchable, and easy for bidders to understand.

Please also use the object description field to share:

• Unique features or notable history of the object
• Condition details and any restorations (if applicable)
• Presence of certificates or original packaging
• Any imperfections or flaws
• Shipping restrictions by country
• Any VAT or import tax implications the buyer may face

 Tip: The more detail you provide, the easier it is for bidders to understand the value of your object – and the more likely it is to sell. Find here more tips on how to write a clear, accurate description. 

📌 Examples of a well-written description:

• Example #1: 

“Discover our timeless Tennis Bracelet: Elegance Meets Sustainability

Product Overview:

Our Tennis Bracelet is crafted from 14 kt white gold and set with 81 brilliant-cut lab-grown diamonds totaling 2.38 ct. A piece that unites elegance with responsible craftsmanship.

Sustainability and Ethics:

Lab-grown diamonds are part of AC Amsterdam’s sustainable philosophy – radiant and responsibly produced.

Authenticity Guaranteed:

Crafted from genuine 14 kt gold and certified under Dutch hallmarking laws. IGI-certified diamonds ensure top-tier quality and purity.

Unique Features:

- Metal: 14 kt white gold 7.79g

- Diamonds: 81 pcs, brilliant cut, total 2.38 ct

- Color: E - F

- Clarity: VS

- IGI Certificate: 39J345012505

- Length: 17.50 – 18.00cm

Customer Experience:

Enjoy secure bidding via Catawiki, supported by AC Amsterdam’s expertise and buyer protection.

Packaging: Comes in luxurious gift packaging – refined and elegant.

Additional Information:

- Shipping: Worldwide, fully insured shipping via FedEx

- International Bidders: Customs details for France, Portugal, and China provided. Contact us for support.

Expert Curation: Exclusively curated for Catawiki by certified experts – premium quality assured”.

• Example #2:

“A captivating pair featuring two transparent Zambian emeralds (totaling 11.55 carats) in an oval brilliant cut, radiating rich green beauty. Accented by 72 natural round brilliant diamonds (0.94 carat total) in near colorless to light pink hues, with SI-I1 clarity, these earrings are set in polished 14k white gold. Weighing 8.54 grams and measuring 35 mm in length, this luxurious piece is a bold yet refined statement of elegance.

Emeralds Information:

Stones Type: Natural Beryl

Shape: Oval Brilliant Cut

Quantity: 2

Carat Total Weight: 11.55 Carat

Color: Green

Transparency: Transparent

Origin: Zambia

Diamonds Information:

Stones Type: Natural Diamond

Shape: Round Brilliant

Quantity: 72

Carat Total Weight: 0.94 Carat

Color: Near Colorless - Light Pink

Clarity: SI-I1

Earrings Information:

Gold Type: 14 kt / Stamp 585

Gold Color: White

Weight: 8.54 gr

Length: 35 mm

• Fully Insured delivery by FedEx or DHL.

• Comes with an IGI certificate and a luxury box.

PLEASE NOTE

* Your country of residence may impose additional VAT, customs, and import fees which are the sole responsibility of the buyer.

* In the USA and Hong Kong the VAT is 0%.

* If the winning bidder decides to cancel/withdraw they will bear the risk, cost of all shipping, and return import duties of the seller.

---French and Portuguese bidders---

Please be aware that you may need a customs broker, which will be solely your responsibility.

In case you need any help with that, don't hesitate to get in touch with us.

---Chinese bidders---

Please note that your purchase can be sent only to Hong Kong or Macao”.

3. Great photos matter

Your photos are the first thing bidders see—make them count. Include 6–12 high-quality images that show the object clearly from all angles to boost trust and increase your chances of a sale.

Your photos should include:

For all submissions:

• 360° view: front, back, sides, top
• Hallmarks, maker’s marks, serial numbers
• Close-ups of key details and flaws
• Full original paper jewellery certificate
• Image with a jewellery box is allowed only if the box is included in the sale

Tip: Use a neutral background (white or black), avoid low-quality images, stock photos, or images with watermarks, logos and text overlays, and aim for natural lighting. Do not use any digital editing, filters or effects. Find here more tips on how to take professional photos.

📌 Examples of good vs. bad photos:

4. Proof of authenticity

To protect our bidders and maintain a trustworthy marketplace, we require laboratory reports and/or proof of authenticity for high-value and exclusive jewellery.

• For pieces with diamond or gemstones estimated above €5,000, a certificate is mandatory. A report for the centre stone is sufficient unless the piece features both a centre stone and side stones totaling over 1 ct, in which case a full jewellery report covering all stones is required from an approved gemological institute (e.g. GIA, IGI, HRD, SSEF, Gübelin, AGL, GGTL, etc).
• For branded jewellery additional verification may be required, such as:
   ✔ Certificate of authenticity
   ✔ Proof of provenance
   ✔ Original invoice or packaging (if available)

Note: Experts may request a lab report at any time if there's uncertainty about a material, origin, or treatment. Please refer to the list of accepted laboratories per country.

📌 Examples of proof of authenticity:

Ready to sell? List your jewellery today

Selling with us is free – commission is only applied if your object sells.

Follow these guidelines to maximise your chances of success.

Register as a seller and submit your jewellery for auction now.