Frequently Asked Questions

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What Grading System is Used?

The patented BrillianceScope® imaging spectrometer measures the light performance of a diamond using 3 Light Performance categories:

  • Brilliance (white light)
  • Fire (color light)
  • Sparkle (scintillation)

How is a diamond’s cut addressed?

GemEx measures every diamond for Light Performance.

Does GemEx evaluate treated stones?

The BrillianceScope does not evaluate treatments. However, diamond treatment may impact Light Performance.

Is there a size requirement?

GemEx measures stones from 0.01 carat up to 12mm with the BrillianceScope®.