Oakley & Forbes diamonds have each been assessed and certified by an independent, internationally recognized and respected grading institution, and as such their quality is accredited. A diamond’s value is based upon characteristics known as the “4C’s”- clarity, colour, cut and carat weight.
Due to the complexity of diamond formation they usually contain unique birthmarks, either internal (inclusions) or external (blemishes). The clarity of a diamond refers to the absence of these inclusions and blemishes, so diamonds without and make are rare and therefore more valuable.
Clarity is measured on a scale ranging from pure (flawless) to heavily included. The clarity of a diamond is graded by using 10x magnifications under good lighting by an experienced grader. The final clarity grade is usually determined by how easy the inclusions and blemishes are for the grader to see. There are six categories on the diamond clarity scale.
Natural Fancy Coloured Diamonds are graded by gemological laboratories under controlled lighting environments using nine categories- the more intense the colour, the more expensive and rare the diamond is.
The carat rating for diamonds and other gemstones refers to its weight. One carat is divided into 100 “points” therefore a diamond measuring 25 points is a ¼ carat in weight, or 0.25ct. One carat is equal to 0.2 grams.
The majority of diamonds used in fine jewellery weigh one carat or less. The carat size is only part of the character and should be judged alongside your diamond’s overall appearance.
Of all the 4C’s, the cut of diamond has the greatest effect on it’s beauty and ensures that a diamond has its maximum brilliance and sparkle. When a diamond is cut well it refracts and reflects light to the maximum degree.