About Certified Diamonds

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A certified diamond is a naturally mined rough diamond or a polished diamond (polished from rough) that has been graded by a professional gemologist or a gemological laboratory.

Available well known gemological laboratories:

GIA - Gemological Institute of America.

AGS - American Gem Society for Diamonds.

IGI - The Institute of Gemology.

EGL USA - Gemological Laboratory.

EGL International - European Gemological Laboratory.

HRD Antwerp.