![]() ![]() The color of a diamond is based on a scale from D (colorless) to Z (yellow) by comparing it to master stones of pre-established color. IGI Diamond Grading StandardsĮach diamond is scientifically analyzed by several gemologists, who combine their experience with state-of-the-art equipment to produce a precise description of the components of the diamond and the quality of its cut.Ī diamond's carat weight and measurements are taken using carefully by calibrated instruments. The IGI's aim is to provide accurate, reliable expertise through education programs and diamond certification. About IGI Diamond CertificationĮstablished in 1975, the International Gemological Institute (IGI) is the largest independent gemological laboratory in the world, operating 18 laboratory locations. They set industry standards and are well respected. They employ leading gemologists and use the highest technologies to grade diamonds. IGI are very reliable independent diamond grading laboratory. Solitaire deals with certified/graded diamonds from the most respected lab: IGI, GIA, GCAL. ![]() Solitaire diamonds are classified IGI diamonds. ![]()
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