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Diamond Colour Grades

D Exceptional White + The Exceptional White (+) diamond with a grade of D is the rarest of the diamond colour range. The diamond will be completely colourless, making it the most valuable colour grade. Grade: Colourless
E Exceptional White The Exceptional White diamond with a grade of E is also very rare. The difference between D and E is hard to detect when compared; this diamond is also graded colourless, which again makes it very valuable. Grade: Colourless
F Rare White + The Rare White (+) diamond is the third highest colour grade achievable. It's graded F, as the diamond is colourless when viewed through the crown. Grade: Colourless when Viewed Through the Crown
G Rare White The Rare White is a fine alternative to the top three colour grades. This colour still makes for an outstanding diamond, and its grade of G means it's colourless when viewed through the crown. Grade: Colourless when Viewed Through the Crown
H White The White coloured diamond has a small noticeable colour difference when compared to the top 4 colour grades; its grade of H is colourless when viewed through the crown. Grade: Colourless when Viewed Through the Crown
I Slighty Tinted The Slightly Tinted White, grade I, is a great staring point if you're buying a diamond on a budget; the colour difference is still very slight, making it hard to tell the difference when compared to other grades. Grade: Slightly Coloured
J Slightly Tinted White Slightly Tinted, this J grade diamond is normally the cut off point for many retail diamond stores, and still offers great value for money. Grade: Slightly Coloured
ref: Jewellery Monthly