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Measuring a Diamond's Colour

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Measuring the colour of a diamond is a fairly easy process. You just place the diamonds with their pavilion up, and examine them using white light against a white background.

The colour of the diamonds are then compared to the calibration diamonds provided by grading labs. The diamond appraiser will then grade the colour based on what he perceives to be the closest match.

The most popular colour scale is that used by GIA, which grades the colour on a scale of "D" to "Z".

As some subjectivity is involved, the same stone could be assigned different colour grades by two different labs. However, we need not worry needlessly as most of the reputable labs are very strict with colour grading nowadays.



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Next: The Colour Grading Scale...