Sell your pieces · Diamantaires OG
Diamond Buyback in Paris: In-Person Appraisal, Firm Offer
Looking to sell a diamond in Paris? Since 1985, our house has been buying diamonds from private individuals at 43 rue Beaubourg, in the 3rd arrondissement. A gemologist examines your stone in front of you, explains what gives it its value, and makes you a firm offer. The appraisal is free and non-binding: if the offer does not suit you, you leave with your diamond.
We are an independent appraisal office. We buy the stone for what it is — its weight, color, clarity, cut — and not for the weight of the metal surrounding it.
Does your diamond come from an estate? See our page on estate jewelry. Is it set in a signed piece (Cartier, Van Cleef & Arpels, Bulgari…)? See our page on signed jewelry.
Before You Visit
Diamonds We Buy
One Carat and Above
Loose diamond or set in a ring, pendant, or earrings. What matters is the weight of the main stone, not the total of a pavé. At 0.90 carat, a very beautiful stone is still acceptable.
Certified or Not
A certificate from GIA, IGI, HRD, or the French Gemological Laboratory facilitates the appraisal. Without a certificate, we establish the stone's characteristics ourselves: many beautiful antique diamonds never had one.
In Signed or Antique Jewelry
Cartier, Van Cleef & Arpels, Bulgari, Boucheron, Chaumet…, or a fine antique piece (Art Deco, Belle Époque): then it is the object that counts, not just the weight of the stones.
To Save You a Needless Trip
What We Do Not Buy
Diamonds Under One Carat
Unless they are set in signed jewelry or a remarkable antique piece. We prefer to tell you before you cross Paris.
Synthetic, Imitations, Rough Stones
Synthetic diamonds (so-called "lab-grown"), moissanites, zircons, and uncut stones: we only buy natural cut diamonds.
Complacent Certificates
Diamonds presented with an EGL, AIG, GIE certificate or a jeweler's "in-house certificate": these documents often state two to three grades above reality, and our house does not buy on that basis.
Is Your Diamond One Carat?
Many people don't know, and that's normal. Two simple ways to find out before you come:
- Measure its diameter with a ruler: a round diamond (brilliant cut) of about 6.5 mm weighs approximately one carat; 5 mm, about half a carat; 4 mm, about a quarter carat.
- Photograph it next to a coin (a 1-euro coin measures 23.25 mm) and send us the photo on WhatsApp: we will give you an estimate, and tell you frankly if the trip is worth it.
If your diamond has a certificate, the weight is listed: it's the "Carat Weight" line.
How the Sale Works
From First Contact to Payment
A Photo Before Coming
Send a photo of the stone — and its certificate if you have one — on WhatsApp, or call 01 48 87 81 44. We will tell you right away if your diamond matches what we are looking for.
Appraisal, In Front of You
At 43 rue Beaubourg, with or without an appointment, Monday to Friday from 10 a.m. to 1 p.m. and 2 p.m. to 6:30 p.m. A gemologist examines the stone before your eyes — weight, color, clarity, cut, fluorescence —, verifies that it is a natural diamond, and explains each criterion.
Firm Offer and Payment
If you accept the offer, payment is immediate, by bank transfer. An ID is required: it is a legal obligation for any buyback. If you decline, you leave with your diamond, free of charge.
Free & confidential estimate
How much is your diamond worth?
Receive an initial price range in 3 steps—a state-certified gemologist will respond within 24 h. No obligation, with the utmost discretion.
In Our Office, 43 rue Beaubourg
Seeing a Diamond As We See It
This emerald-cut diamond was filmed in our office after appraisal. This is what a gemologist sees: the regularity of the facets, the clarity of the stone, the way light travels through it — elements no photo truly captures.
- ◆ Each stone is examined in front of you, with a loupe and refractometer
- ◆ The observed characteristics determine value: color, clarity, cut, weight
- ◆ Free, no-obligation appraisal, with or without certificate
What Determines the Buyback Price of a Diamond
The price of a diamond primarily depends on its four characteristics, the "4Cs": carat weight, color (from D, the whitest, to Z), clarity, and cut quality. Two stones of the same weight can have very different values based on these criteria. Fluorescence, proportions, and the stone's condition (chips, nicks) also matter. To track prices, consult our 2026 diamond price guide and our diamond price guide.
Why the Buyback Price Differs from the Jewelry Store Price
The price paid in a jewelry store includes the retailer's margin, design, brand, and VAT. The buyback price reflects the stone's value on the professional market. The difference can be surprising: it's better to know before the appraisal. Our role is to give you a fair price, explained criterion by criterion.
With or Without a Certificate
A certificate from a recognized laboratory describes the stone and facilitates the sale; it is a working basis, and we always examine the stone itself. Without a certificate, we establish its characteristics during the appraisal. To learn more: selling a diamond without a certificate and buying GIA certified diamonds.
Google Reviews
They have placed their trust in us
« Very satisfied. My 2-carat GIA diamond was bought back within minutes, instant payment. 10/10! »
« Many thanks for the sale of my Boucheron solitaire. Transparent appraisal and immediate payment. »
« Warm welcome, top-notch expertise. My Van Cleef necklace was bought back at a price well above other offers received. »
With or without appointment
Book your appraisal slot
We also welcome walk-ins, Monday to Friday. If you prefer a guaranteed time slot with no waiting, choose your slot below: booking is possible at any time.
available
Please select a date on the calendar to view available time slots.
Do you prefer to call? 01 48 87 81 44 · Mon – Fri · 10am-1pm · 2pm-6:30pm
Frequently Asked Questions
Selling a diamond: your questions
Do I need an appointment to sell a diamond?+
No. We welcome you with or without an appointment, Monday to Friday, from 10 a.m. to 1 p.m. and from 2 p.m. to 6:30 p.m. An appointment guarantees a time slot with no waiting; you can book online at any time.
From what weight do you buy back a diamond?+
We are looking for diamonds of one carat and above (0.90 carat for a very beautiful stone). Below that, we will not ask you to travel, unless the diamond is set in a piece of jewelry signed by a major house or on a remarkable antique piece.
My diamond has no certificate: can you buy it back?+
Yes. We establish its characteristics ourselves during the appraisal. Many beautiful antique diamonds have never been certified.
Which certificates are accepted?+
Those from GIA, IGI, HRD, and the French Gemological Laboratory. Certificates from EGL, AIG, or GIE, as well as "house certificates" from jewelers, are not recognized by the profession: the company does not buy on this basis.
How much is my diamond worth?+
It depends on its weight, color, clarity, and cut. The simulator on this page or a photo on WhatsApp will give you a first idea; the firm price is only set after examining the stone, in front of you.
How do I get paid?+
If you accept our offer, payment is immediate, by bank transfer. A proof of identity is required for any buyback: this is a legal obligation.
Can I have my diamond appraised without selling it?+
Yes. The appraisal is free and without obligation: you are free to refuse the offer and leave with your stone.
Do you buy back synthetic diamonds?+
No: neither synthetic diamonds (so-called "lab-grown"), nor moissanites, nor zircons, nor rough stones. The appraisal also allows us to verify that your stone is indeed a natural diamond.
The Appraisal Office
43 rue Beaubourg, Paris 3rd
A stone's throw from the Centre Pompidou, our appraisal office welcomes you Monday to Friday, with or without an appointment. You are received in complete discretion by a gemologist, who examines your diamond in front of you.
