Colour is the next most important aspect of distinguishing quality detectable by the human eye. 90% of diamonds have slight hues of yellow or brown. The colour is determined by comparing the gem to an internationally approved set of master stones in a gem lab. The intensity can vary from colourless to slight yellow. The scale is alphabetically graded from D-Z. The average colour grade in the marketplace is I-K. Many consumers do not notice any colour in the diamond until the L-M-N range. The most desirable diamonds are in the colourless range. NEXT PAGE | Colour Nuances 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24