Sell your pieces · Diamantaires OG
Diamond Buyback in Paris: In-Person Appraisal and a Firm Offer
Want 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 value, and makes you a firm offer. The appraisal is free and without obligation: if the offer doesn't suit you, you leave with your diamond. Already received an offer elsewhere? Our house commits to doing better.
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 also our estate jewelry page. Is it set on a signed piece (Cartier, Van Cleef & Arpels, Bulgari…)? See our signed jewelry page.
Before You Visit
Diamonds We Buy
One Carat and Above
Loose diamond or set in a ring, pendant, or earrings. What counts is the weight of the main stone, not the total of a pavé setting. 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 determine the stone's characteristics ourselves: many beautiful old diamonds never had one.
On Signed or Antique Jewelry
Cartier, Van Cleef & Arpels, Bulgari, Boucheron, Chaumet…, or a fine antique piece (Art Deco, Belle Époque): in that case, the object matters, 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 on signed jewelry or on 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 "house certificate": these documents often claim 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 coming in:
- 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 of a carat.
- Photograph it next to a coin (a 1 euro coin measures 23.25 mm) and send us the photo on WhatsApp: we'll give you an approximate weight and tell you frankly if the trip is worth it.
If your diamond has a certificate, the weight is on it: 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 of its certificate if you have one — on WhatsApp, or call 01 48 87 81 44. We'll tell you right away if your diamond matches what we're looking for.
In-Person Appraisal
At 43 rue Beaubourg, with or without 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's a legal obligation for any buyback. If you decline, you leave with your diamond, free of charge.
Free & confidential appraisal
Have your piece appraised
Describe the piece in 3 steps: a state-certified gemologist will reply within 24 h and tell you if it matches what we are looking for. The price is then determined during the in-person appraisal, with the piece in hand — free of charge and without obligation.
At Our Office, 43 rue Beaubourg
Seeing a Diamond the Way We Do
This emerald-cut diamond was filmed at our office after appraisal. This is what a gemologist sees: the regularity of the facets, the clarity of the stone, the way light passes through it — elements that 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 estimate, with or without certificate
What Determines a Diamond's Buyback Price
The price of a diamond primarily depends on its four characteristics, known as 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 condition of the stone (chips, nicks) also matter. To track prices, see our 2026 diamond price index and our diamond price guide.
Why the Buyback Price Differs from the Retail 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, so it's best to know this 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 serves as a working basis, but we always inspect the stone itself. Without a certificate, we determine its characteristics during the appraisal. Learn more: selling a diamond without a certificate and buying GIA-certified diamonds.
Google Reviews
They put their trust in us
« Very satisfied. My 2-carat GIA diamond was bought back in a few 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 far higher than other offers I received. »
With or without an appointment
Make an appointment by telephone
Call us Monday to Friday, from 10 a.m. to 1 p.m. and 2 p.m. to 6:30 p.m.: we will set a time that suits you, without waiting. You may also come without an appointment during opening hours.
43 rue Beaubourg, 75003 Paris · Rambuteau metro station · 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 receive you 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. An appointment guarantees you a time slot with no waiting: it can be arranged by phone at 01 48 87 81 44.
From what weight do you buy back a diamond?+
We look for diamonds of one carat and above (0.90 carat for a very fine stone). Below that, we will not ask you to travel, unless the diamond is set in a piece signed by a major house or in a remarkable antique piece.
My diamond has no certificate: can you buy it back?+
Yes. We determine its characteristics ourselves during the appraisal. Many beautiful antique diamonds have never been certified.
Which certificates are considered valid?+
Those from GIA, IGI, HRD, and the Laboratoire Français de Gemmologie. Certificates from EGL, AIG, or GIE, as well as "house certificates" from jewelers, are not recognized by the profession: the house does not buy on that basis.
How much is my diamond worth?+
It depends on its weight, color, clarity, cut—and its nature, natural or synthetic. These criteria can only be judged with the stone in hand: the firm price is set during the appraisal, in front of you, and each criterion is explained to you.
Can you appraise my diamond from a photo?+
We never give a price from a photo: the color, clarity, and nature of a stone cannot be seen on a screen, even for a professional, and two stones identical in a photo may have no relation in value. A photo, along with the certificate if you have one, allows us to tell you whether your diamond fits what we are looking for, and thus whether the trip is worth it.
Is the appraisal chargeable? Does it commit me to selling?+
Neither. The appraisal is free and without obligation, and it takes about twenty minutes. If the offer does not suit you, you leave with your diamond.
I don't have an invoice (gift, inheritance): is that a problem?+
No. Many diamonds are gifts or inheritances, without an invoice. Only an ID is required, as for any buyback: it is a legal obligation. The certificate or box, if you have them, are welcome.
How do I get paid?+
If you accept our offer, payment is immediate, by bank transfer. An ID is required for any buyback: it is a legal obligation.
Do you buy directly, or on consignment?+
Directly. We buy the stone ourselves, with no consignment or commission: the offer is firm, and if you accept it, payment is immediate.
I already have an offer elsewhere: can you do better?+
Yes. If a colleague has already made you an offer, the house commits to doing better. Show us the piece before deciding: the appraisal is free and without obligation, and you have nothing to lose.
I live far from Paris: what should I do?+
Start by sending us a photo and the certificate on WhatsApp: we will tell you if your diamond fits what we are looking for, before you travel. Appraisals are done at 43 rue Beaubourg; for a significant collection in France, our expert may travel, never abroad.
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 through Friday, with or without an appointment. You are received in complete discretion by a gemologist, who examines your diamond in front of you.
