DIAMOND COLOR - Contents

The Gemological Institute of America (GIA) has devised a set of guidelines to grade diamond colour. The colour of graded diamonds is compared to that of control stones, which are pre-selected gems of a specific colour.

• D: Absolutely colourless. The highest colour grade, which is extremely rare.
• E: Colourless. Very negligible traces of colour can be noticed by an expert gemmologist. A rare diamond.
• F: Colourless. Very negligible colour traces can be seen by an expert gemmologist, but still considered a "colourless" grade. A high-quality diamond.
• G-H: Near-colourless. Colour noticeable when compared to diamonds of better grades, but these grades offer excellent value.
• I-J, K: Colour slightly detectable. An excellent value.
• L-M: Noticeable colour. Not carried Ketan Diamonds.
• N-Z: Noticeable colour. Not carried Ketan Diamonds.