Diamond Colour
When people speak of a diamond's colour, they’re referring to the presence or absence of colour in white diamonds. The whiter and more colourless the diamond, the greater its rarity and value – and the more brilliantly it will sparkle. This is because colourless diamonds allow more light to pass through than coloured diamonds.
So diamond colour is actually about what you can’t see, and a diamond’s value is determined by how closely it approaches colourlessness. The exception to this rule are fancy colour diamonds [link] which lie outside the colour scale but are actually more valuable for their colour.
A diamond’s colour is a result of its composition, and due to the formation process, only very few (and very rare) diamonds are truly colourless. Unsurprisingly then, the whiter a diamond, the greater its worth. Many diamonds may appear colourless to the untrained eye, but closer inspection will almost certainly reveal small traces of brown or yellow.
Diamonds are graded according to a universal grading system introduced by the Gemological Institute of America (GIA). This colour scale ranges from D (colourless) to Z, and prices tend to differ significantly between two adjacent colours.
Fancy colour diamonds [link] lie outside the Gemological Institute of America’s colour grading scale, but it’s their unique and unsual colour that makes them so valuable. Very rare and very expensive, fancy colour diamonds vary in colour from blue to green to bright yellow, as well as pink and even red.
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