The weight of a diamond is measured in carats and one carat weighs one-fifth of a gram. The word is derived from the carob seeds that were used to balance scales in ancient times. One carat is divided into 100 points so that a diamond of 0.75carat weight is 75 points. Usually the larger the diamond, the more rare it is. Fine quality can be found in diamonds of all shapes and sizes. It's important to find a diamond size that suits you and the style of jewellery you're buying.

Cut and mounting can make a diamond appear bigger (or smaller) than its actual weight. Talk to us about how to find the right diamond and setting to optimise the beauty of the stone.

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