Loose diamonds are graded by unbiased, third party entities, and a diamond’s price is based on these assessments of cut, color, clarity and carat weight, as well as the presence (or lack thereof) of fluorescent characteristics. This is the basis of diamond certification, and a diamond’s value can be weighed against that of comparable diamonds based on evaluation of their respective certificates. You may also see a diamond certificate referred to as a diamond grading report or a diamond dossier.
All loose diamonds purchased from PAERIP are accompanied by either GIA (Gemological Institute of America) or EGL (European Gemological Laboratory.)
The Gemological Institute of America (GIA) was established in 1931 and is considered the world’s foremost authority on diamonds, as well as colored gemstones and pearls. The primary purpose behind the institution of the GIA is to provide education and consumer protection through objective laboratory evaluation of gemstone quality. The GIA is a non-profit organization driven by the self-declared mission to “ensure the public trust in gems and jewelry by upholding the highest standards of integrity, academics, science and professionalism through education, research, laboratory services and instrumental development.” It is through decades of upholding this mission that GIA has attained it position of leadership in the diamond industry.
The Gemological Institute of America is headquartered in Carlsbad, California and maintains offices in many major cities worldwide, including:
As the world’s foremost gemological lab, GIA is entrusted with grading and classifying more gems than any other lab. GIA laboratories employ only expert diamond graders and gemologists, and their practices have set the industry standard worldwide. GIA guarantees objective, independent evaluations, employing elaborate processes which ensure every diamond’s anonymity through every stage of its evaluation.
A GIA Diamond Grading Report is all inclusive with regard to value assessment based on quality evaluation of each and every diamond.
One of the largest independent gemological institutions in the world, the European Gemological Laboratory (EGL International) was founded in Europe in 1974, with the first U.S. branch (EGL USA) to follow just a few years later in 1977, located right in the heart of the international diamond district. Since then, EGL has gone on to set high standards in the field of gemology as a respected member of the international diamond community.
EGL operates in the following major cities:
Participants at every stage of the diamond certification process, all the way to the consumer, benefit from the assurance provided by EGL certification. EGL provides diamond certification services to international diamond manufacturers, dealers, mining companies and retailers as well as the general public. Certificate numbers are preceded by a designation of “US” or “CA” indicating the country of origin as well as authenticity of issuance by a member of the EGL Group.