Acting as a prism, a diamond can divide light into a spectrum of colours and reflect this light as colourful flashes called fire. Just as when looking through coloured glass, colour in a diamond will act as a filter, and will diminish the spectrum of colour emitted. The less colour in a diamond, the more colourful the fire, and the better the colour grade.
|D||Absolutely colourless. The highest colour grade, which is extremely rare.|
|E||Colourless. Only minute traces of colour can be detected by an expert gemologist. A rare diamond.|
|F||Colourless. Slight colour detected by an expert gemologist, 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||Near-colourless. Colour slightly detectable.|
|K-M||Noticeable colour. Not carried by La Mode Fine Jewellers. Upon request only.|
|N-Z||Noticeable colour. Not carried by La Mode Fine Jewellers. Upon request only. Noticeably natural yellow diamonds can be used in either white gold or platinum to produce an effect that can be attractive. Heat and pressure treated diamonds, as well as irradiated diamonds are now offered in a variety of colors, blue, yellow, green, red, pink, cognac, chocolate, to name a few. Though we do not recommend these for engagement rings they do make for stunning diamond jewellery.|
A Note About Flourescence
Some people seek diamonds that produce this unique effect, while others avoid it. The visible effects of fluorescence grades of faint, inert, negligible, and medium, can only be detected by a trained gemologist with specific UV light. A fluorescence grade of strong or very strong can make a diamond with a near-colourless grade look even whiter. In some very rare instances a diamond with very strong fluorescence can give the diamond a slight hazy or oily appearance. Diamonds with a strong or very strong fluorescence are a better value for the end customer because the market prices them slightly lower than diamonds with faint or negligible fluorescence.
What Colour Grade Is Best?
For the purist, look for a colourless diamond with a grade of D - F.
For an excellent value in a diamond with no noticeable colour to the unaided eye, look for a near-colourless grade of G - I.