The diamond 4Cs: carat, colour, clarity and cut
Carat describes weight, not size. Together with colour, clarity and cut, it helps you understand diamond quality. These four characteristics are known as the 4Cs.
Carat: diamond weight
One carat equals 0.20 grams. Two diamonds of the same weight can look different in size because of shape and proportions. In jewellery with several stones, carat may describe combined weight. Check whether the product specifies total weight or weight per stone.
Colour: from D to Z
GIA's D to Z scale describes the degree of colourlessness for diamonds within this colour range. D is the most colourless grade. Colour is assessed under controlled conditions. Naturally coloured diamonds are evaluated differently.
Clarity: inclusions and blemishes
Clarity describes internal inclusions and external characteristics. Assessment considers factors including number, size and position under ten times magnification. A clarity grade alone does not tell you exactly how a stone will look when worn.
Cut: more than shape
Cut concerns proportions, symmetry and polish that affect light and brilliance. Round, oval, pear and emerald describe shapes. Shape and cut quality are not the same thing.
Read the details together
Compare weight, colour, clarity and cut alongside the design of the piece. Read its individual description and a grading report when available. Ask us about anything unclear before choosing.
