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Most diamonds can appear white to the natural eye but many display hints of colour especially on closer inspection. A diamond’s value increases with the absence of colour, so the closer it is to colourless the rarer and more valuable it will be.However, diamonds outside the normal colour range – fancy coloured diamonds as they are known, are the rarest and command even higher prices according to colour and availability, for example, blues, and pin

Colour Grade

The grading scale for white or colourless diamonds starts at D which is colourless, working through the alphabet to Z which has the greatest saturation of below or brown colour. Technically, diamonds graded G have visible colour, however this is usually noticed from H colour diamonds onwards. A master set of diamonds in the different colour grades is used by diamond graders to compare stones and accurately assess the colour.
P - L - ER - 17 - M002 - A A 1 0.2

Spectrum of Colours

Diamond colour actually refers to a lack of colour, this is because a diamond can divide light into a spectrum of colours but colour in the diamond acts like a filter thereby reducing the spectrum of colours emitted. The less colour, the better the colour grade will be.

P - L - ER - 17 - M002 - A A 1 0.2

Expert Advice

We are always happy to discuss your diamond requirements and help with any questions that you may have to find that right diamond for you.

A - L - ED - 14 - Z01 Velocity drop - A A 2 0.3

Colour Grade F

Diamonds graded D-F are considered colourless, G-I near colourless and J -Z tinted. At Fultons we use diamonds that are colour graded F for our shop stock (unless otherwise stated). Please ask for more details.

Explore our diamond jewellery

Browse our exquisite range of diamond set pieces, all expertly designed and lovingly handmade by our master craftsmen in our Keswick workshop. If you have any questions, please get in touch with one of our knowledgeable and friendly team.


The cut of a diamond is all about unlocking the most out of the stone using the art of gemstone cutting


Diamond clarity refers to the absence of naturally occurring inclusions within the stone or blemishes on the surface


The name carat is derived from the carob tree as the seeds were of a constant weight, 1ct equals 1/5th of a gram


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