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Sayyid & Najjar Co.
An Art Deco diamond and platinum bracelet with matching drop earrings on black stone

We Buy — Fine & Signed Jewellery

A signature is an asset. We price it as one.

Sell signed jewellery by Cartier, Van Cleef & Arpels, Bulgari, Graff, Harry Winston, Tiffany and Chopard. Period and estate pieces valued on maker, era and condition. Dubai, since 1983.

Ask a generic gold buyer what a Van Cleef Alhambra necklace is worth and they will weigh it. That single act can destroy eighty percent of the value in front of you, and it happens every day.

Signed jewellery trades on a secondary market with its own logic, and period pieces follow different rules again. We hold four decades of auction results and trade catalogues, and when we make an offer we can show you the comparable sales it rests on.

Signed high jewellery pieces including a diamond necklace and bracelet on dark velvet
Signed and period pieces — valued on maker, era and completeness, never melted.

Key facts

Houses covered
Cartier, VCA, Bulgari, Graff, Winston, Tiffany, Chopard, Boucheron, Piaget
Periods
Georgian through contemporary
Unsigned pieces
Purchased and valued on craftsmanship and stone quality
Authentication
In-house, with maker verification where required
Estates
Complete collections assessed on site, worldwide
Our commitment
No signed piece is ever bought for melt

Specifically

What we purchase in this category

If your piece is not listed here, it does not mean we are not interested — it means it is unusual enough to warrant a conversation.

Cartier

Love, Juste un Clou, Panthère, Trinity, Clash and Tank jewellery, plus high jewellery and period pieces. Original certificates, boxes and service papers add real value.

Van Cleef & Arpels

Alhambra in all metals and stones, Perlée, Frivole, Zip and Mystery Set pieces. Discontinued stone combinations are especially sought after.

Bulgari

Serpenti, B.zero1, Divas' Dream, Parentesi and Tubogas. Vintage 1960s–1980s Roman-period pieces command strong collector interest.

Graff & Harry Winston

High jewellery where stone quality dominates. We value the diamonds to GIA standards and the signature on top of that.

Tiffany, Chopard, Boucheron, Piaget, Chaumet

Archive and current-collection pieces, including Tiffany Schlumberger and Elsa Peretti, Chopard Happy Diamonds and Piaget Possession.

Period & estate jewellery

Georgian, Victorian, Edwardian, Art Nouveau, Art Deco, Retro and Mid-Century. Signed or unsigned, single pieces or complete estates.

What moves the price

The variables that decide your number

We show our working on every offer. These are the factors we weigh, in roughly the order they matter — so you can see where the money is before you hear the figure.

01

Maker and model

The single largest multiplier. An iconic, instantly recognisable model from a top-tier house resells far more readily than an anonymous piece of equal material value.

02

Era and production period

Certain periods are collected intensely — Cartier’s London workshop, Bulgari’s 1970s Roman output, Van Cleef’s mid-century Mystery Set work.

03

Condition and originality

Original stones, unpolished surfaces and factory-correct components matter. Aftermarket stone replacement or heavy refinishing reduces value noticeably.

04

Completeness

Box, certificate, original receipt, service history and maker’s pouch can together add ten to twenty percent to a signed piece.

05

Stone quality

For high jewellery, the gems are the greater part of the value. We grade them to laboratory standards before considering the signature at all.

06

Current catalogue status

Pieces still in production are benchmarked against boutique retail; discontinued references trade on scarcity, which sometimes puts them above it.

Questions

Sell Fine & Signed Jewellery — answered

Do I need the original box and certificate to sell a Cartier or Van Cleef piece?

No, but they are worth having. A complete set — piece, box, certificate and original receipt — typically realises ten to twenty percent more than the piece alone, because it removes the buyer’s authentication risk entirely. Without papers we authenticate in-house, examining hallmarks, serial numbers, construction details and stone-setting technique, and where necessary we arrange verification with the maker directly. Missing papers reduce the figure; they never prevent the sale.

How do you authenticate signed jewellery?

By examining the things that are difficult to fake: hallmark punches and their era-correct form, serial and reference numbers against maker archives, solder joins and construction methods, stone-setting style, and the precise finish of engraving. Counterfeit Cartier Love bracelets and Alhambra pieces are widespread and some are very good, but almost all fail on internal construction or on the weight and feel of the metal. For pieces above a certain value we submit to the maker’s own authentication service as a matter of course.

Is a vintage piece worth more than a modern one?

Sometimes considerably more, though not automatically. A discontinued reference that collectors actively want — an early Bulgari Serpenti, a Cartier Tutti Frutti, a Van Cleef Mystery Set clip — can exceed the retail price of anything comparable in the current catalogue. An ordinary vintage piece with no particular provenance is simply an older piece, and is valued on its materials and workmanship. Rarity plus demand creates premiums; age alone does not.

Will you buy an entire estate or collection?

Yes, and it is a significant part of what we do. We handle deceased estates, divisions of assets and collection rationalisations regularly, working alongside executors, family offices and legal advisers. For substantial collections we will travel to you anywhere in the world, catalogue and value item by item, and make a single consolidated offer with each line itemised so beneficiaries can see exactly how the total was reached.

Enquire

Tell us what you have

A photograph and a report number are enough to begin. We reply within one working day with an indicative range and the benchmark behind it.

  • Free assessment, no obligation to sell
  • Firm written offer, valid against market movement
  • Same-day settlement in AED, USD, EUR, GBP or CHF
  • Insured, tracked shipping arranged at our cost

Sell Fine & Signed Jewellery

Everything you send is read by a principal in Dubai and goes no further.

Or write to private.office@sayyidnajjar.com