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Estimate your GIA diamonds with Diamantaires Paris today

01 48 87 81 44
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GIA diamond appraisal

How do you value a GIA-certified diamond?

FREE GIA DIAMOND APPRAISAL

Get the value of your diamond certified by a GIA laboratory certificate, free of charge.
Sell a Jewel / Diamond

The Gemological Institute of America (GIA) in New York is the best possible certification for your diamond.
A diamond that has passed the stringent quality controls required for GIA certification will automatically add value.
Each GIA-tested gemstone is assigned a unique certificate number, which is indexed in a database open to the public directly from the GIA website.
So we buy your GIA diamonds from 1ct, our offer is free and we buy your stone with immediate payment.
We guarantee the best buy-back conditions for your diamond.

01 48 87 81 44

Request your free GIA diamond appraisal online.
DIAMOND GIA

GIA RANKING REPORT

A simple explanation to better understand the GIA grading system.
The 4 Cs:
  • 1 color (clarity),
  • 2 Clarity,
  • 3 size (Cut)
  • 4 Carat
The 4Cs are of paramount importance in the diamond market. The GIA implements all these analysis procedures by highly qualified gemologists. After analysis, GIA delivers the diamonds under seal, with the certificate number laser-printed on the rondiste. Mass analysis is calculated in carats (1ct=0.2gr) using a highly accurate balance. Color for colorless to tinted diamonds is graduated from D to Z., Cape, Brown. For "Fancy" diamonds, there are several colors and gradations according to hue, nuance, homogeneity, brilliance, etc. All diamonds are analyzed to determine whether they are natural and not synthetic. Treatments are indicated on the certificate. Luminescence is the diamond's reaction to ultraviolet rays, ranging from None to Very Strong. Diamond Purity defines the nature, location and number of inclusions in the diamond. For this analysis, it is necessary to loosen the stone and clean it thoroughly. More about the contents of a certificate

What is the GIA?

Sell / Estimate a diamond for free GIA Buying a diamond is not always easy for those who are not professionals and cannot

The French Gemmological Laboratory

01 48 87 81 44 Our customer service is at your disposal free of charge for further information about Laboratoire Français de Gemmologie. You can also

GemReaserch Swisslab GRS

GemReaserch Swisslab (GRS) is a Swiss gemmological laboratory that produces reports on gemstones, including diamonds. This laboratory has

Selling an HRD diamond

To distinguish a real from a fake diamond, or to find out a diamond's true value, some laboratories produce analysis reports or certificates of authenticity. These

European Gemological Laboratory (EGL)

The European Gemological Laboratory (EGL) is one of the few gemological laboratories authorized to issue a certificate attesting to a diamond's value, along with the

IGI DIAMOND

We guarantee the best prices, so if you have a direct buyout offer from a competitor, we'll not only match it, but we'll also make sure you get the best possible price.

Need help appraising your jewel?

  • No appointment necessary: 43 Rue Beaubourg, 75003 Paris

01 48 87 81 44

The GIA purity gradation scale is :

  • 1 Pure "Flawless""
  • 2 Internally Flawless
  • 3 VVS1
  • 4 VVS2
  • 5 VS1
  • 6 VS2
  • 7 SI1
  • 8 SI2
  • 9 P1
  • 10 P2
  • 11 P3
Example of a GIA 768x1024 1 certificate
Cut is defined by the symmetry of the diamond's facets and by the finish, i.e. the polish, proportions, thickness of the rondist and size of the culet. These gradations range from "Excellent" to "Mediocre". Diamond dimensions are expressed in millimeters. Proportions describe the relationship between crown height, breech, total height, diameter, etc.). Symmetry gives the diamond's visual appearance, ranging from "Excellent" to "Poor". Polish indicates the condition of the stone's surface, ranging from "Excellent" to "Poor".
We recommend that you consult our various guides:
  • Diamond certificate guide
  • Diamond purity guide
  • Diamond shapes guide
  • Diamond price guide
  • Diamond color guide

Diamond Certificate Guide

We guarantee the best prices for your GIA-certified diamond, if you have a direct buy-back offer from a competitor,

Diamond shape guide

When choosing a diamond, shape is one of the first criteria to consider. Diamonds come in a variety of shapes, some of which you may prefer

Guide - VVS purity diamonds

We guarantee the best prices, so if you have a direct buyout offer from a competitor, we'll not only match it, but we'll also make sure you get the best possible price.

Guide - Couleur Diamant

The color or hue of a diamond is one of the criteria used to determine its value. In nature, diamonds are found in

Guide - Prix Diamant

We guarantee the best prices, so if you have a direct buyout offer from a competitor, we'll not only match it, but we'll also make sure you get the best possible price.

to sell a diamond

At Diamantaire Paris, we understand the importance of each diamond and its unique story. Our GIA diamond appraisal service is designed to offer an accurate and transparent valuation, ensuring that each stone receives the attention it deserves. Our expertise is not limited to valuation, but also extends to the sale and purchase of high-quality jewelry. Whether you're looking to sell a bracelet or buy a vintage Van Cleef & Arpels set, our meticulously selected collection features pieces that combine timeless elegance with modern sophistication.
For those looking to understand the value of their stones, our guide to the contents of a GIA certificate offers detailed information, ensuring a complete understanding of what your diamond has to offer. In addition, our Diamond Price Guide is an indispensable tool for those looking to value or invest in diamonds of 2 carats or more.
Our jewelry store in Paris is more than just a retail outlet; it's a place where passion for jewelry and expertise meet. Whether you're looking to sell a JAR designer jewel or a Ferstenberg-certified diamond, our team is dedicated to offering personalized services to meet your specific needs.
At Diamantaire Paris, every piece of jewelry is treated with the utmost care and respect. Our commitment to excellence is reflected in our wide range of services, including free jewelry appraisals, diamond buy-backs, and the opportunity to sell diamond earrings. Our expertise and passion for jewelry make us the ideal choice for all your diamond and precious jewelry needs. --> Learn more about jewelry inheritance laws in France

You can obtain the value of your GIA-certified diamond free of charge by contacting Diamantaire Paris OG on 01 48 87 81 44 or by visiting us directly at 43 rue Beaubourg 75003 Paris.

Diamantaire Paris OG guarantees the best prices for GIA diamonds. If you have a direct buy-back offer from a competitor, they'll match it and offer to outbid you.

GIA evaluates diamonds based on the 4 Cs: color, clarity, cut and carat. Each diamond receives a unique certificate number, and analyses are carried out by highly qualified gemologists.

GIA (Gemological Institute of America) certification is the best possible certification for a diamond. It ensures that the diamond has passed stringent quality controls, adding value to the stone.

You can visit us at 43 rue Beaubourg 75003 Paris, with or without appointment, Monday to Friday, 10am to 1pm and 2pm to 7pm.

Yes, Diamantaire Paris OG has a catalog of antique jewelry and diamonds for sale. You can browse their collection for high-quality pieces.

Yes, you can send a pre-appraisal by email to achat@diamantaire-paris.com or here, although it's advisable to visit us for a more accurate assessment.