Diamond Certification

A diamond certificate, also known as a diamond grading report, is an easily understood document prepared by an expert gemologist that describes the key characteristics of a diamond. A certificate from a gemological laboratory verifies the quality of a loose diamond and allows non-experts to make educated diamond buying decisions.

At Brilliance, we rely on 5 highly regarded, internationally acclaimed gemological laboratories to certify every loose diamond we offer. These laboratories use universally recognized standards for grading diamonds.

GIA Certified

Founded in 1931, the Gemological Institute of America, or GIA, is an independent, non-profit organization considered by many to be the world's foremost authority in gemology. Introduced in 1953, their diamond and gemstone grading system is recognized worldwide. Manufacturers from around the world send diamonds and gems to GIA for examination and analysis.

When a diamond is accompanied by a GIA certificate, the consumer is assured that the stone has been analyzed by an unbiased gemologist who upholds the highest standards of integrity, science, and professionalism.

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AGS Certified

Since 1943, the American Gem Society (AGS) has demonstrated a commitment to upholding the highest ethical standards in the diamond and jewelry industry. Driven by a goal to provide premium education for jewelry professionals and consumers, the society offers courses to all segments of the diamond industry. The AGS established a laboratory in 1996 to provide modern grading services for the diamond market.

Its conservative and unbiased approach to diamond grading has made the AGS one of the world's most respected gemological laboratories. Consequently, an AGS certificate guarantees an accurate analysis and evaluation of a diamond.

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EGL Certified

The European Gemological Laboratory, or EGL, was founded in Belgium more than 30 years ago. EGL is committed to protecting the integrity of the jewelry trade and promoting public interest through applied science, innovation, education, and exceptional service. The laboratory is credited with introducing new approaches to diamond grading and conducting advanced research with physicists, geologists, and mineralogists. An EGL certificate is a valued document that aids consumers in the diamond buying process and is the result of thorough scrutiny of a diamond.

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IGI Certified

Established in 1975, the International Gemological Institute, or IGI, is the largest independent gemological laboratory in the world, with locations in all major diamond centers. IGI's mission is to provide jewelry professionals and consumers with extensive education programs and reliable diamond and fine jewelry certification.

An IGI certificate is comprised of a detailed analysis of a diamond's characteristics by several expert gemologists.

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HRD Certified

The Hoge Raad voor Diamant (HRD), translated as "Diamond High Council", was established in Antwerp in 1973 as the European counterpart to the GIA. Representing the global diamond trade to public governments and diamond organizations, HRD monitors and reports the import and export of over half of the world's loose diamonds.

HRD is at the forefront of advanced research and education in the diamond industry. Based on internationally accepted standards, an HRD diamond certificate is highly regarded among jewelers and consumers.

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GIA Diamond Grading Report and Seal Icon
AGS Diamond Quality Report and Seal Icon
EGL Diamond Certificate and Seal Icon
IGI Diamond Report and Seal Icon
HRD Diamond Report and Seal Icon

How it Works How it Works

A Diamond Grading Reports includes an assessment of the 4Cs – Color, Clarity, Cut, and Carat Weight – along with a plotted diagram of its
clarity characteristics and a graphic representation of the diamond’s proportions. For standard round brilliant cut diamonds falling in the
D-to-Z color range, the report also includes a GIA Cut grade. Scroll over the area below to learn more.

Sample GIA Certification Report

GIA Diamond Grading Report

GIA Report Number

Every diamond is assigned a unique report number that corresponds to a certificate.

GIA Diamond Grading Report

Shape and Cutting Style

Not to be confused with cut grade, the Shape and Cutting Style refers to the out line of a diamond, when viewed from above.

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GIA Diamond Grading Report

Measurements

Measured in millimeters, the measurements of a diamond's length, width, and height are used to aide in evaluating the symmetry and cut quality.

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GIA Diamond Grading Report

Carat Weight

The carat is the standard unit of measurement used to indicate the weight of diamonds and precious gemstones.

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GIA Diamond Grading Report

Color Grade

A diamond's color is graded face-down against a white background and has a significant impact on its appearance and value. The diamond color scale begins at D (colorless) and ends at Z (light yellow).

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GIA Diamond Grading Report

Clarity Grade

Measured in millimeters, the measurements of a diamond's length, width, and height are used to aide in evaluating the symmetry and cut quality.

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GIA Diamond Grading Report

Cut Grade

The cut determines the symmetry of the stone's facets, its overall proportions, and its ability to reflect light. An expertly-cut diamond will achieve high levels of brilliance, sparkle, and durability.

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GIA Diamond Grading Report

Polish

For maximum brilliance, every facet of a diamond should be professionally polished after the cutting process. A high quality polish will leave little to no scratches and marks, while a poor polish can result in imperfections on the surface of the diamond, which can lower its value.

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GIA Diamond Grading Report

Symmetry

A symmetrical diamond will have well-balanced, properly aligned facets, resulting in a high level of fire and brilliance. If the facets are not symmetrical or not optimally shaped, they'll display less sparkle.

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GIA Diamond Grading Report

Fluorescence

Fluorescence, the effect ultraviolet (UV) light has on a diamond, is an important consideration when selecting a diamond. When UV light strikes a diamond with fluorescent properties, the stone emits a glow that is usually blue.

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GIA Diamond Grading Report

Inscription(s) and Comments

Any additional information about your diamond, like inscriptions or clarity characteristics, will be included here.

GIA Diamond Grading Report

Proportions

A diamond's proportions, a measure of the number and size of facets and its overall length and width, are integral in determining the quality of its cut.

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GIA Diamond Grading Report

Clarity Characteristics

This diagram depicts the types and locations of inclusions in the stone.

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GIA Diamond Grading Report

Color Grading Scale

GIA Color Grading Scale and the visibility of yellow within the stone, rated from D (colorless) to Z (yellow).

GIA Diamond Grading Report

Clarity Scale

GIA Clarity Grading Scale and the visibility of inclusions within the stone, rated from Flawless/Internally Flawless to Included.

GIA Diamond Grading Report

Clarity Characteristics

The GIA assigns a Cut Grade to round cut diamonds, which can be rated from Excellent to Poor.

GIA Diamond Grading Report

GIA Seal and QR Code

In addition to a number of security measures on your report, every certificate comes with the official laboratory seal and a unique code for you to access the certificate online.