FANCY DIAMOND RINGS
Say It In Technicolour
Independent Grading Of Fancy Diamonds
Coloured diamonds (or what jewellers call "fancy diamonds") are graded by the GIA in much the same way as all other diamonds but with a particular focus on the intensity and vivacity of colour.
The GIA system for colour-grading fancy diamonds is designed to accommodate the fact that not all coloured diamonds have the same depth of colour. For example, yellow diamonds occur in a wide range of saturations, while blue diamonds do not.
Compared to fancy yellows and browns, diamonds with a noticeable hint of any other hue are considerably more rare. Even in light tones and weak saturation, as long as they show colour in the face-up position, they qualify as fancy colours.
Red, green, and blue diamonds in dark tones and moderate saturations are extremely rare.