GemEx Diamond Certification


GemEx is an independent laboratory that focuses on light performance, or the movement of light through the diamond.

Trained professionals use the GemEx BrillianceScope® Analyzer to measure a diamond's white light (brilliance), color light (fire) and scintillation (sparkle).

These measurements are then compared to those of other diamonds of the same shape. The highest and lowest amount of white light, color light and scintillation possible for each shape was set by measuring thousands of diamonds.

The GemEx Light Performance Report illustrates the measurements for your diamond in a three-bar graph.

Learn more about some of the most well-known diamond grading laboratories HERE »

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