Independent house · State-certified gemmologists · Paris, since 1985
Independent expert assessment of signed jewellery, diamonds and antique jewellery
We assist private individuals and heirs with the valuation, sale or acquisition of fine jewellery pieces, diamonds and important gemstones — with the utmost discretion, in the heart of Paris.
Reply within 24 h · No obligation · Absolute confidentiality
Our expertise
What we handle
We focus our expertise on three categories of high-value assets.
Signed jewellery
Cartier, Van Cleef & Arpels, Bulgari, Boucheron, Chaumet… Creations from the great maisons, signed and hallmarked.
Valuable diamonds
Stones certified by GIA, IGI or HRD — or to be certified. Solitaires, old cuts and collector diamonds.
Antique & heirloom jewellery
Family jewellery, Art Deco and vintage pieces, important coloured gemstones from estates.
Our clientele
For whom do we intervene?
Heirs & families
You have inherited jewellery and wish to know its true value before making any decision — whether to sell, divide or keep. We provide objective, discreet guidance.
Owners of valuable jewellery
You own a signed piece or a diamond and wish to obtain an independent valuation, a stress-free sale or simply advice, with no obligation.
Referrers & advisors
Notaries, wealth managers, solicitors: we act as independent experts for your clients, regarding estates and divisions.
The right asset choice
Diamond dealer or auction house?
You are selling
Part with a piece at the right price
Gemmological assessment carried out before you, firm offer and immediate payment — whether your piece is certified or not. You remain free to accept or decline.
Have a piece appraisedYou are buying
Acquire a certified diamond
GIA diamonds and exceptional jewellery selected by the house, offered at trade price — a serious alternative to retail jewellery.
View our GIA diamondsThe boutique — Diamantaires OG
Our exceptional pieces for sale
GIA-certified diamonds and signed jewelry, selected by our gemologists and sold without intermediaries.
Sautoir vintage Alhambra Van Cleef & Arpels, 20 motifs or rose, diamants et nacre
Alliance américaine sertie diamants taille émeraude 7 cts
Bague saphir de Ceylan naturel taille coussin 18,50 carats
Collier Chaumet or gris 95.10 grs
No items in this category at the moment — tell us what you are looking for.
They have trusted us
The trust of our clients
« Very satisfied. My 2-carat GIA diamond was bought back in a few minutes, instant payment. 10/10! »
« Warm welcome, top-notch expertise. My Van Cleef necklace bought back at a much higher price than other offers received. »
« A big thank you for the sale of my Boucheron solitaire. Transparent appraisal and immediate payment. »
Frequently Asked Questions
Your questions
How does an initial assessment take place?+
You may visit us without an appointment at 43 rue Beaubourg, or send us photos and a description via the confidential form. A state-certified gemmologist will examine your pieces in your presence, explain each value criterion and, if you wish, make a firm offer.
What types of jewellery do you assess?+
Signed jewellery from the great maisons (Cartier, Van Cleef & Arpels, Bulgari, Boucheron, Chaumet…), diamonds — certified or not —, antique jewellery and important coloured stones: sapphire, ruby, emerald.
Do you work on estate matters?+
Yes, this is one of our core activities. We assist heirs, families and notaries: objective appraisal of pieces, advice on selling or keeping, and immediate purchase if desired, in complete confidentiality.
Are you direct buyers?+
Yes. Unlike intermediaries and auction houses, we buy directly, with no commission or delay: the offer is firm and payment immediate. We also sell certified diamonds and exceptional jewellery.
Do you guarantee confidentiality?+
Absolutely. No piece appears in a public catalogue, no file is shared. The assessment takes place in-store, one-on-one, and each transaction is settled in strict compliance with French regulations.
The house
43 rue Beaubourg, Paris 3rd
A stone's throw from the Centre Pompidou, our boutique has welcomed you without an appointment since 1985. You are received in complete discretion by a state-certified gemmologist, who assesses your pieces before you.
First step
Let's talk in complete confidentiality
Tell us about your item: a gemmologist will reply within 24 hours with an initial analysis and, if you wish, a discreet appointment proposal.
- ◆ Free, no-obligation preliminary analysis
- ◆ No data shared, no publication
- ◆ Independent assessment by a state-certified gemmologist