Each diamond is colour-graded from “D” to “Z” where “D” is totally colourless and “Z” is light yellow.
Due to a diamond’s high brilliance and dispersion of light when looking through the diamond’s table or crown, colour grading should be determined by examining the diamond through the side of the pavilion but not looking at the top.
To determine the colour, a diamond is placed face down and compared to an internationally accepted master set of stones under controlled lighting and precise viewing conditions.
Colorimeter will also be used to increase the reliability and accuracy of the colour grading of diamonds.
