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Diamond Guide

Diamonds, the world’s most popular gemstones, characterised by their incredible hardness, prized for their associations with treasure and love, desired for their brilliance and sparkle.

Diamonds are characterized by the 4 Cs – carat, colour, clarity and cut.

We’ll guide you to the diamond that perfectly fits your requirements and budget.


Carat is the term used to describe the weight of the diamond rather than its size. Gemstone weights are expressed in carats which are divided into 100 points, so a diamond weighing half a carat is described as 50 points or 0.50ct. The carat weight affects the price of a diamond more than any of the other 4 Cs – the heavier the diamond the higher the cost.


The cut of a diamond, its proportions and facets determines the light dispersion and has the greatest influence on overall appearance and sparkle. As this is the only characteristic not solely influenced by nature, the cut can be exposed to human error. At Fultons we understand this, therefore, each diamond is carefully hand selected so that you can be assured your jewellery will be set with only the finest gemstones.
Master Jeweller Brian Fulton holds the Advanced Craft Certificate in Jewellery Design and Manufacture and is a Fellow of the Institute of Professional Goldsmiths. He has also been admitted into the Freedom of the Mystery of Goldsmiths of the City of London by Redemption and he is a member of the National Association of Jewellers.

Brian Fulton


The clarity of a diamond is determined by the inclusions within the stone or blemishes on the surface. The inclusions occur naturally and are the reason that every diamond is unique. The grading of a diamond’s clarity depends on the size, colour and location of any inclusion or blemish, and is assessed by 10x magnification. We can help you with your choice, taking into account your chosen style and budget.


Most diamonds can appear white to the natural eye but many display hints of colour especially on closer inspection. The closer the diamond 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 in the jewellery trade, are the rarest and command even higher prices according to colour and availability, for example, blues, greens and pinks.

Conflict Free and Ethically Sourced Diamonds

Doing the right thing right is a priority at Fultons. It is important for us to know where the materials in our products come from. That is why we only use ethically sourced ore in all the jewellery we make.


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