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The 4 cs are Cut, Colour, Clarity, & Carat Weight

It was in 1939 that the De Beers Group introduced the concept of the 4c's and the now commonly used way of recognising a diamonds unique characteristics is described as Carat, Colour, Clarity and Cut.

A diamond’s weight is measured in Carats and in points. One carat equals one hundred points ( 0.01 carat = l point ). One carat is equal to 0.20 grams. Taken by individually the carat weight does not determine a diamond’s value. For example, two one-carat stones can vary widely in price when clarity, color, cut and presence are taken into consideration. Although generally the higher the carat weight the more expensive the diamond. The Carat Weight of a diamond refers to the actual weight of the stone, therefore, Carat also corresponds to the size of the diamond, as the larger the diamond is, the heavier it is.

The cut of a diamond describes the symmetry, proportions and finish of a polished diamond. Diamond cut, not to be confused with the shape of the stone, is the appraisal of the diamond’s facets and the their ability to transmit light and sparkle.There is an art to diamond cutting which requires the skills and workmanship of a master cutter to bring from a rough stone a polished diamond. The scales for Cut moves from excellent to poor and the precise shape and positioning of a diamond’s facets is the most important factor in determining the stone’s beauty. A diamond cut to achieve good symmetry and proportion will sparkle more than one that has been cut too deep or shallow.


Diamond ring

Cut also determines shape. The Round Brilliant and Princess cut (square shaped) diamonds are the most popular shapes. A variety other shapes including; oval, marquise, heart, emerald, pear, asscher, cushion, trillion, baguette and radiant diamonds are available and we relish using unusual cuts in our work to dramatic effect.

Colour is the hue of the diamond or the lack thereof. The most valued and rare colour of a diamond is white, or colourless. Scaling from D-Z, the colour band of diamonds move alphabetically from colourless through to an increasing presence of colour. The diamonds used in all our rings are typically F colour or above.

Clarity corresponds to the purity of a diamond and is a judgment of the internal presence of inclusions and the external visibility of blemishes. The regularity, size, nature, and position of these characteristics is considered and graded on a scale of IF (Internally Flawless) to I3. A diamond that has minimal inclusions and surface blemishes are rare and more valuable. This is because the smaller and fewer the inclusions, the more light can pass through the diamond, which contributes to its rare beauty. A stone is said to be flawless if, under 10-power magnification, no internal flaws (clouds, feathers, pinpoints) or external imperfections (scratches, pits, nicks) are visible. Absolutely flawless diamonds are exceedingly rare. When buying a diamond from Brian Fulton Jewellery, please ask us about certification, as we can source a diamond for you that has been certified by GIA, EGL, or others if it is larger than 0.30ct.