What is EGL Diamond Certification?

by Willyou.net * Jun 2, 2021

While looking at your diamond in person is the best way to figure out whether or not it’s the right choice for your engagement ring, it’s obvious that the best way to really get to know the specifics of your diamond – and, in particular, its value – is to take a look at its report.

The GIA’s methods are the most widely used – and the ones we reference more than any other – but they’re definitely not the only organization offering an accepted method for grading diamonds.

The EGL (or European Gemological Laboratory) is a diamond-grading lab that provides diamond certification for diamonds. An EGL diamond certification is a document that validates the diamonds authenticity and true value, although opting for EGL diamonds over GIA graded diamonds certainly offers its own advantages and disadvantages.

The History of EGL Certification

The European Gemological Laboratory, EGL, was founded in 1974 in Europe with international locations found in Antwerp, London, Paris, Mumbai, Johannesburg, Hong Kong, Seoul, Tel Aviv, New York, Los Angeles, Vancouver, and Toronto.

EGL labs have over 1,000 scientists, diamond graders and diamond educators. They are most well known for their grading techniques with diamonds weighing less than one carat and establishing the controversial SI3 diamond clarity rating.

Unlike both GIA and AGS certifications, EGL is a for-profit organization, not a non-profit one. Therefore, it’s credentials are considered “looser” than the others – a little like the GSI’s grading system, which is favored by the larger chain jewelers across America.

What is the SI3 Clarity Rating?

SI3 is a continuation of the SI clarity grade, which you will likely already know by the GIA’s own standards. The GIA consider this grade to have two degrees – SI1 and SI2 – with any diamond not capable of meeting the criteria for SI2 being given a grade of I1 instead.

The SI3 grade, created by EGL, is meant to differentiate the better I1 diamonds from ones with slightly more inclusions. In other words, on the EGL scale, SI3 Clarity sits between the I1 and SI2 grades.

The idea behind this additional grade is to include diamonds that would otherwise be known as “undesired diamonds” and show that they are still beautiful, despite their low clarity grade. Since plenty of eye clean diamonds can be found at the SI1 and SI2 grades, the idea behind it was that shoppers would be more inclined to consider these diamonds that would otherwise fall short of the mark.

The SI3 grade is considered a controversial topic on the grading scale. Its value for shoppers – and even its recognition – totally depends on who you speak to in the diamond industry.

EGL Certified Diamonds

The EGL certification will provide you with a full diamond certification/grading report for a diamond. It can also give you an origin report of the diamond if requested.

The certificate itself includes information on the Four C’s (carat, clarity, color and cut), as well as details of proportion and symmetry. EGL will also provide a laser inscription inside the diamond to link it to its certification report.

What an EGL Certification Means

A diamond containing an EGL certification means that it has been measured and graded by an independent EGL laboratory. However, it has been criticized by many for its lower grading standards, leading to inconsistent ratings. This is why some diamond dealers will not stock diamonds with an EGL certification.

It is also worth noting that an EGL certification is less expensive than other certifications, making it an ideal choice for those on a strict budget – not to mention the fact that their labs are capable of completing diamond reports faster than some of the other more popular labs.

GIA vs EGL Diamond Grading

There is a reason by the GIA has long-since represented the most widely-used and accepted gemological institution for diamond grading – and why, at WillYou.Net, all of our diamonds come with a complete GIA report: they are consistent.

As soon as an institution starts to seem a little contradictory or loose in its approach to diamonds, you know that it is not able to offer the same level of assurance to shoppers as other trusted organizations. This is the trouble with the EGL – and why it consistently falls below the GIA in terms of acceptance.

The value of any diamond report lies in its adherence to a high standard. Without that, shoppers just don’t know if they’re investing into an inferior diamond. Unfortunately, shoppers looking at EGL diamonds cannot put that same level of trust into the reports that they could otherwise put into the GIA’s reports.

The EGL Diamond Grading Report Sample

The EGL Diamond Quality Report provides a complete assessment of the stone’s 4 C’s: color, clarity, carat and cut. The report also dives deeper into the cut by analyzing information about proportions and polish of the diamond.

Like the GIA, the EGL’s reports also feature a plotting diagram, which shows the position, size and shape of each inclusion and blemish.


Advantages & Disadvantages of EGL Diamond Certification


Like many of the lesser-known methods for diamond certification, the EGL offers a more cost-effective approach to diamond grading. This, coupled with the fact that the EGL is much faster to turnaround diamond reports than the infamously slow GIA and AGS labs, means that it offers an attractive alternative to some of the less-informed shoppers out there.


Within the global diamond community, the EGL’s approach to diamond grading is not regarded as being anywhere near as consistent or reliable as the approach offered by the GIA, or the AGS.

They are also considered to be a little less exacting in their approach, as evidenced by the SI3 grade, which is given to diamonds that, to the GIA, would typically be regarded as I1 quality. In other words, the SI3 grade can be misleading to first-time shoppers – as can any diamond report that lacks the stringent standards held by the GIA.

You can browse our full range of GIA certified diamonds here.