Clarity refers to how blemish free the stone is, both inside and on the surface. Small carbon deposits or other inclusions, cracks, fissures all detract from a diamond’s value. These small imperfections can be referred to as nature’s fingerprints, the presence of inclusions is not a negative feature as it shows the stone is authentic. Learn more >



Cut is the only diamond characteristic directly influenced by man – the other three are dictated by nature. A good round brilliant cut releases the fire, life and sparkle of a diamond through the arrangement and proportions of its 57 or 58 facets (tiny planes that create angles to reflect light). The shape of a diamond is a matter of personal taste, with many different shaped cuts available, for example; pear, oval and heart. Learn more >



Although it is generally thought that diamonds are colourless, there are actually a wide range of hues which can greatly affect value. Colourless or near-colourless diamonds can be graded. Diamond colours are generally graded on an alphabetic scale, from D, which is the best, to Z, which is a distinctly yellowish-brown colour. However, if a diamond has a strong colour it is termed a fancy coloured diamond and some such stones are much sought after. Learn more >


Carat Weight

The weight of a diamond is given in its carat equivalent. One carat is 0.2 grams and is divided into 100 points, i.e. 100 points equals 1.0 carat. The carat weight of a stone does not itself set the value of a stone; this depends greatly on the other three variables that exist; Colour, Clarity, Cut. Learn more >



When purchasing a product from W. E. Clark and Son we are able to give you a guarantee and a sense of confidence in its quality and value. Learn more >


Certified Diamonds

We do stock a number of certificated diamonds, we are able to source any diamond to your requirements. Please contact us for further information.