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.


Gemological Institute of America (GIA)

Founded in 1931, the Gemological Institute of America (GIA) is an independent, non-profit organization widely considered as the world's foremost authority in gemology. Introduced in 1953, their diamond and gemstone grading system is recognized as an accepted standard worldwide. Gemstone manufacturers from around the globe send diamonds and gems to the GIA for expert examination and analysis.

The GIA's mission is to increase consumers' trust in diamonds and jewelry by upholding the highest standards of integrity, academics, science, and professionalism. They work toward this goal by providing jeweler and consumer education, conducting meticulous research, and developing state-of-the-art laboratory instruments for diamond inspections.

GIA Diamond Grading

The GIA Diamond Grading Report is issued for diamonds that fall in the D-Z color range. This detailed report includes a full quality analysis of shape and cutting style, measurements, carat weight, color grade, clarity grade, cut grade (for brilliant round-cut diamonds), polish and symmetry assessments, and fluorescence. The report also includes a plotted diagram indicating the relative size and location of clarity characteristics, a proportion diagram, and GIA grading scales.

GIA Diamond Dossier
The GIA Diamond Dossier® is issued for diamonds between 0.15 and 1.99 carats that fall in the D-Z color range. This report includes all of the information featured in the Diamond Grading Report without a plotted diagram. All diamonds accompanied by a Diamond Dossier are laser inscribed and registered in the GIA inscription registry.

Contact the Gemological Institute of America (GIA)
5355 Armada Drive 
Carlsbad, California 92008 
Toll-Free: 800-421-7250 
Phone: 760-603-4500 Fax: 760-603-1814
www.gia.edu


International Gemological Institute (IGI)

 Established in 1975, the International Gemological Institute (IGI) is the largest   independent gemological laboratory in the world, with locations in all major diamond trade cities. The IGI's mission is to provide the industry's professionals and consumers with accurate, reliable expertise through education programs and through diamond and fine jewelry certification.


Contact the International Gemological Institute (IGI)


IGI New York

589 Fifth Avenue 
New York, NY 10017 
Phone: 212-753-7100 
Fax: 212-753-7759 

www.igi-usa.com 

IGI Belgium (World Headquarters)

Schupstraat 1 
2018 Antwerp 
Belgium 
Phone: +32 3 401 08 88 
Fax: +32 3 232 07 58 

www.igiworldwide.com


American Gem Society (AGS)

Founded in 1943, the American Gem Society (AGS) is dedicated to upholding the highest standards of ethics and integrity in the diamond and jewelry industries. Among the main priorities of the association is top-notch industry education, with numerous courses offered to jewelry professionals and consumers.
In 1996, the AGS established a laboratory to provide modern gemstone grading services for the diamond marketplace. Its conservative, thorough approach to diamond grading has made the AGS one of the world's most respected gemological laboratories.

Contact the American Gem Society (AGS)
8917 West Sahara Avenue 
Las Vegas, Nevada 89117 
Phone: 702-233-6120 
Fax: 702-233-6125 


European Gemological Laboratory (EGL)

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.

Contact the European Gemological Laboratory (EGL)
EGL USA
6 West 48th Street 
New York, New York 10036 
Phone: 212-730-7380 
Fax: 212-842-5180 

Contact the European Gemological Laboratory (EGL)
23 Tuval St. 
Ramat Gan, Israel 52522 
Toll-Free: 888-454-6818 
Phone: +972 3-752-8428 
Fax: +972 3-751-0047 



Hoge Raad Voor Diamant (HRD)

The Hoge Raad voor Diamant (HRD), translated as the 'Diamond High Council', was established in Antwerp in 1973 as the European counterpart to the GIA (Gemological Institute of America). In addition to monitoring the import and export of more than half of the world's loose diamond supply, the HRD issues widely recognized certificates for diamonds and gemstones based on internationally accepted standards.
The HRD's mission is to develop Antwerp as a world diamond center by representing the diamond sector in Belgium and abroad to public governments and diamond organizations. Furthermore, they also strive to increase industry knowledge by conducting thorough research in manufacturing and trade efficiency.

Contact the Hoge Raad voor Diamant (HRD)
Hoveniersstraat 22 
BE-2018 Antwerp 
Belgium 
Phone: +32 (0)3 222 06 11 
Fax: +32 (0)3 222 06 99 

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