Champagne diamonds are in nature coloured diamonds that are fashioned in a wide range of colours from light straw to rich cognac.
The 4C's of colour, cut, clarity and carat weight apply to coloured diamonds just as they do to colourless diamonds apart from the intensity of colour, not lack of it, plays a greater part in the assessment.
Argyle Diamonds created the following scale especially for champagne diamonds. The diamonds are graded on a C1-C7 colour scale. C1 and C2 symbolize light champagne, C3 and C4 medium champagne, and C5 and C6 dark champagne. The fancy cognac diamond is graded C7.
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