Diamond Certificates: GIA, HRD and IGI Explained
A diamond without an independent certificate is a story; a diamond with one is a fact. This page gathers what matters about diamond certificates: what a grading report is, how GIA, HRD and IGI differ, how to read and verify a report, and why an uncertified stone is the real risk. Every stone in our natural diamonds in stock is graded by GIA or HRD: see our GIA-certified diamonds and our HRD-certified diamonds.
What is a diamond certificate?
A certificate, which laboratories call a grading report, is an independent laboratory’s opinion on one specific stone, examined loose, out of any setting. It records the exact weight, shape, measurements, colour, clarity, cut grade for rounds, polish, symmetry, fluorescence and, on full reports, a plotted map of the inclusions. Neither the seller nor the buyer can argue with it, which is precisely the point.
What a certificate is not matters just as much. It is not a valuation, an invoice or a promise of a fair price: it describes the stone, it does not tell you what to pay. For that, the trade’s reference is the Rapaport price list. Nor is it an insurance valuation, which is a separate document.
GIA, HRD and IGI: the three laboratories in brief
Three names appear on most of the reports you will come across. All three are genuine laboratories, but they hold different places in the market.
| GIA | HRD | IGI | |
|---|---|---|---|
| Full name | Gemological Institute of America | Hoge Raad voor Diamant (the Diamond High Council) | International Gemological Institute |
| Known for | The world benchmark for natural diamonds | The benchmark of the European trade | High volumes, above all lab-grown diamonds |
| Clarity scale | FL, IF, VVS1 to I3 | LC, VVS1 to SI2, P1 to P3 | FL, IF, VVS1 to I3 |
| Online check | GIA Report Check | Official HRD report verification | On IGI’s own website |
| On our diamonds | Yes | Yes | No |
GIA
The Gemological Institute of America created the colour scale, D to Z, and the clarity scale, FL to I3, that the whole world now uses. Its grading is known for being strict and consistent, and its report is recognised everywhere, which matters for insurance and for any future resale. For a natural diamond, it is the benchmark. Our guide on how to read a GIA diamond report walks through every section.
HRD
HRD, the Diamond High Council, is the reference laboratory of the European trade. It grades to a standard comparable with GIA and uses the same colour letters; its clarity grades are almost identical, with two different names: LC (loupe clean) at the top of the scale and P1 to P3 at the bottom. Our comparison of GIA and HRD certificates shows how they differ in practice.
IGI
The International Gemological Institute is a serious, recognised laboratory built to handle very large volumes. It is now the leading laboratory for lab-grown diamonds. It grades natural diamonds too, but for a natural stone the trade prefers GIA or HRD, whose grading is considered more consistent. An IGI report is nothing unusual in itself; you simply will not find one on our stones. Our article on GIA vs IGI certification compares the two in detail.
Our rule: natural, GIA or HRD, no exceptions
Many lesser laboratories grade generously, and a certificate that flatters a stone by two grades silently overprices it by the same amount. That is why our rule has no exceptions:
- Every diamond is natural and sold with its original GIA or HRD report.
- The laboratory and report number of each stone are shown, and the certificate is sent to you on WhatsApp on request, with the stone’s 360° video.
- No house certificates, no minor laboratories, no lab-grown stones for sale.
- Our name and standing in the Beirut trade behind every stone we sell.
How to read a diamond certificate
Whichever laboratory issued the report, your eye should go to the same lines:
| Report line | What it tells you | What to check |
|---|---|---|
| Report Number | The stone’s unique identifier in the laboratory’s records | That it is identical on the paper, the stone’s listing and the online database |
| Shape and Cutting Style | Round brilliant, oval, cushion, princess | That the shape matches the stone on offer |
| Measurements | The dimensions in millimetres | That they fit the weight: a stone cut too deep looks smaller |
| Carat Weight | The weight to a hundredth of a carat | The exact figure, especially just below a round weight |
| Color Grade | A grade from D to Z | The grade, judged against the metal of the future setting |
| Clarity Grade | A grade from FL to I3, or LC to P3 on HRD reports | The grade, then where the inclusions sit on the plot |
| Cut, Polish, Symmetry | The quality of the cutting and finish | Excellent where possible; an overall cut grade is given for rounds only |
| Fluorescence | How the stone reacts under ultraviolet light | None or faint is safe; if strong, check the video for haze |
| Comments | The laboratory’s remarks | Any mention of treatment, or of features not shown on the plot |
| Origin | Natural or laboratory-grown diamond | That it says natural for a stone sold as natural |
The inclusion plot is where experience pays: an inclusion at the edge, hidden by a prong, will never show, while the same one under the table catches the light. Our diamond colour and clarity chart explains every grade, and our guide on reading a GIA report line by line goes further.
How to verify a certificate online
A GIA or HRD report can be checked free, in a few minutes, on the laboratory’s own website. Work in this order:
- Note the report number printed on the certificate.
- Open the laboratory’s website your own way, by typing its address yourself, never through a link or QR code supplied with the stone.
- Enter the number and read the whole report: weight to the hundredth, measurements, colour, clarity, shape, and the natural origin line.
- Compare every line with the paper you were given and the stone’s listing. Any mismatch should end the sale.
- Leave the match between the stone and its paper to a professional. A genuine report can be paired with the wrong stone, and confirming it takes an examination under magnification: it is not a job for the buyer alone. Buy from an established dealer; in a private sale, have the stone checked by an independent gemmologist before you pay.
Our guide on how to verify a GIA or HRD certificate online covers each step, and our article on certificate swapping explains the fraud that passes every check of the document alone.
Why an uncertified diamond is the real risk
The GIA vs IGI debate draws the attention, but the real danger lies elsewhere: buying a diamond with no certificate at all. An uncertified stone means taking the seller’s word on colour, clarity, cut and, above all, origin, natural or lab-grown. To the naked eye, and even under a loupe, a fine lab-grown diamond and a natural one can be impossible to tell apart; only an equipped laboratory settles the question.
Without a report, you have nothing to verify and no recourse. A grade you cannot check is not a grade, it is a sales pitch. Be wary too of a report from an unknown laboratory with a reassuring acronym: it can flatter the stone by several grades. The certificate is the floor of trust, not the ceiling. Our comparison of lab-grown and natural diamonds explains why the origin line matters so much.
Our guides to diamond certificates
- GIA vs IGI certification: the two laboratories compared, and why IGI leads in lab-grown stones.
- GIA vs HRD certificates: recognition, strictness and the report lines to read first.
- How to read a GIA diamond report: every section of the report, line by line.
- How to verify a GIA or HRD certificate online: the steps in a few minutes, and the warning signs.
- Certificate swapping: real paper, wrong stone: how a genuine report ends up with the wrong diamond.
- GIA-certified diamonds in Lebanon: our GIA stones in stock in Beirut.
- HRD-certified diamonds in Lebanon: our HRD stones in stock in Beirut.
Common questions
What is the difference between a GIA and an HRD certificate?
Both laboratories grade natural diamonds with the same strictness and the same colour letters. GIA is the world benchmark, recognised everywhere; HRD is the benchmark of the European trade. Their reports differ mainly in a few grade names, such as LC on HRD reports instead of FL or IF. A fine stone is judged on its grades, not the logo.
Is an IGI-certified diamond a real diamond?
An IGI report can describe a natural diamond or a lab-grown one, which is also a diamond in the physical sense. Read the origin line and check the report on IGI’s website. For a natural stone the trade prefers GIA or HRD, the only two laboratories behind our diamonds.
How can I tell if a diamond certificate is genuine?
Type the laboratory’s address yourself, enter the report number and compare every line with the paper and the stone’s listing. A genuine report is not enough on its own, though: the stone must be the one it describes, which is why buying from an established dealer matters.
Does a certificate tell you what a diamond is worth?
No. A certificate describes the stone; it does not value it. The price of a certified natural diamond is built against the trade’s benchmark, the Rapaport list, then adjusted for cut, fluorescence and how the stone actually looks. An insurance valuation is a separate document.
Will I receive the original certificate with my diamond?
Yes. Every diamond from diamonds.com.lb is sold with its original GIA or HRD report. Before you even reserve, the stone’s certificate and 360° video are sent to you on WhatsApp, so you can check the number online before you commit.