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Roy W. Macdonald FGA, DGA

Bespoke Jewellery Designer PO Box 100, Callander, FK17 8ZR Tel 07710 544321

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Diamonds - The 4cs         

CUT: The way a diamond is cut and polished is vital. It is the precision and the delicacy of the cut that dictates the maximum amount of light the diamond will refract and reflect. The better its cut, the greater will be its brilliance, sparkle and fire. Appraisal and evaluation of a polished diamond starts by determining its Diameter, Table, Crown, Girdle, Pavilion, Culet and Depth. It is important to know a diamonds cut because a diamond with a perfect color and clarity having a poor cut may make the diamond lack brilliance and fire. Read More Diamond cut


COLOR: Most diamonds look colorless, but there are many subtle shade differences and the closer a diamond is to having no color the more valuable it becomes. The subtle differences in hue make it difficult for the untrained eye to notice any color difference. Diamonds with no hint of color at all (D) are very rare, but also rare are diamonds with strong color, These are called 'Fancies'.  Read More Diamond Colour

CLARITY: Thanks to nature, every diamond is unique. Each one possesses its own individuality. This could be due to minute traces of other minerals trapped during the crystallization process. It is common for diamonds to have slight imperfections. These natural characteristics or imperfections, called 'inclusions' are better described as nature's fingerprints and help gemologists determine the quality of a diamond. Clarity is a very important factor in determining a diamonds value. The diamonds clarity is based on the type and location of the inclusions and blemishes. Greater clarity gives greater brilliance and less interference with the waves of light as they travel through the crystal. Read More  Diamond Clarity

CARAT (weight): A diamond's weight is the simplest of its characteristics to measure, and from the earliest times has been used to calculate on aspect of the value of a diamond. Each carat is divided into 100 points. For example a quarter of a carat is 25, written as 0.25ct. It is easy to weigh an un-mounted diamond, but once it is in a setting, it is only possible to estimate it's weight by using special gauges and formulas. Read More Diamond Carat Weight


It is very important to remember bigger does not always mean better. A diamonds value is based on a balance between a great many factors. The 4C's: cut, color, clarity and carat weight form the basis of evaluation but there are other special characteristics that have to be taken into account in the determination of the ultimate value of a diamond.