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Diamond Certificate
What's in a Certificate?
A certificate is a blueprint of a loose diamond. Wholesalers, retailers, and consumers alike know a certificate as either a diamond grading report or diamond dossier. A certificate will tell a diamond’s exact measurements, weight, cut and overall quality. A certificate will precisely point out a diamond’s individual characteristics as well as be a useful tool when identifying a stone. When shopping for a loose diamond, considering stones that have a grading report will allow you to make an informed decision on which diamond will be ideal for you.
G.I.A.
 G.I.A. is the number one, most respected laboratory in the world. Any diamond submitted to G.I.A. is ensured to have reliable and consistent grading. Anywhere from 3-6 separate gemologists will individually grade each and every diamond for an accurate final grade. G.I.A. grading reports have been considered to be a hallmark of integrity throughout the diamond world. G.I.A. issues two separate types of reports. One of the more common reports is the full issued G.I.A. document, which will have the full description of the diamond as well as a plotting of the grade setting clarity characteristics of that stone. This report is generally used for diamonds 1.00ct and above. The second type of report issued through G.I.A. is the Dossier, which is typically done on diamonds under a carat. The G.I.A. Dossier will have the full individual details of each diamond graded, however the plotting which is normally seen on a report, has been replaced by a laser inscription registry number. This number has been laser inscribed on the diamond’s girdle allowing for verification of the stone without a mapping of inclusions. This has allowed G.I.A. not only to save money on issuing full reports on smaller diamonds but has also saved the necessary time needed in plotting a stone’s diagram.
A.G.S.
 A.G.S. is known through out the diamond industry as grading top-notch ideal cut round diamonds. Their high standards surpass those of any other grading laboratory when considering color and clarity as well as cut. If a diamond has been graded by A.G.S. Lab, it has met the standards of what is considered the perfect proportions, polish, and symmetry; and has been given a grade of “ideal” or a “000” rating. A.G.S. Ideal cut round diamonds are highly sought after in today’s market.
EGL Diamonds - European Gemological Laboratory (EGL)
EGL has been considered one of the key innovators in gem appraisal, having developed several methods of scrutinizing the quality of diamonds. It was the first lab to grade diamonds weighing less than one carat. It also introduced the "S13" designation for establishing clarity now accepted and used by the diamond industry and gemological laboratories around the world.
EGL Diamond Grading Process
A team of 8 experts, including 4 trained and experienced gemologists, looks at every diamond submitted to EGL. They then implement a series of tests.
First, the diamond is weighed and measured, and its culet and girdle thickness measured with very precise instruments. Then it is placed in a specially lighted room (which has been scientifically calibrated for exact results). Here, the team looks at the stone's color, by comparing it to a set of master diamonds. At least 3 experts must agree on the color grade for the results to be official.
In order to check for clarity, the diamond is examined with a special zoom binocular microscope. The experts look at all of the diamond's facets, scrutinizing for blemishes and inclusions. These are then mapped on a diamond diagram also referred to as a diamond plot.
The diamond is then tested for polish and symmetry, which are indications of the skill and craftsmanship of the cutter. The team checks proportions, and measures the brilliance of the stone.
EGL also offers a service that can allow buyers to identify or embellish very precious stones. This is the Diamond Laser Script service.
Using high-precision instruments, EGL can inscribe the EGL certificate number on a diamond, along with key information like the weight, color and clarity grade. Clients can also write their name or personal messages (even "Happy Anniversary!").
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