5 c's of Diamonds

Unlike other jewellers Gems believe that the best way to understand value for money is to appreciate the position of the jeweller.

How do we price jewellery and determine the quality of a product ?

Buying a diamond is one of the most expensive purchases you will probably ever make. This diamond buying guide explains how to get the highest quality diamond for your money and how to protect yourself.

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5 c's of a Diamond

Diamonds are graded by four characteristics: cut, carat (weight), clarity, and color. All 5 of these properties determine how much a diamond is worth.

  • Cut
  • What is the proportion of the diamond? Round brilliant diamonds are commonly cut with 58 facets. The better proportioned these facets are on the diamond, the more light will be reflected back to the viewer's eye. This is extremely important. When cut properly, the diamond will sparkle more. Diamond cuts are measured by the table percentage, so always ask for it. A good table percentage is between 55-60%. Cut also refers to the shape such as: round, pear, and oval.

    If you are having a diamond mounted, write down the measurements of your stone. Measurements never change. Measure the stone after it is mounted and verify that it matches the appraisal and/or certificate.

  • Carat Weight
  • How big is the diamond? Larger diamonds often cost more per carat due to their size. There are 100 points to a carat. Hence a 50 point diamond is 1/2 a carat. (There are 5 carats to a gram.) Always get the actual point size of a diamond rather than a fractional weight. Sometimes jewelers will try to sell a .90 diamond as a 1 carat diamond. A .90 diamond should be substantially less expensive.

  • Clarity
  • How clear is the stone? Clarity ranges from flawless (perfect) to I (included). Here is a chart:

    Flawless: perfect inside and out Internally Flawless: may have minor blemishes on the outside VVS1, VVS2: have very very small inclusions. VVS1 inclusions can only be seen through the pavilion. VVS2 inclusions are more visible. VS1, VS2: have very small inclusions. VS1 inclusions are harder to see than VS2. SI1, SI2, SI3: have small inclusions I1, I2, I3: have inclusions visible to the naked eye.

  • Colour
  • Diamond colors generally range from D - X for white and yellow diamonds. D is the whitest. Around S they become "Fancy" yellow Diamonds. One can also find green, pink, red, blue and brown diamonds - though these are usually irradiated.

  • Confidence
  • It is crucial when choosing a diamond to review the diamond certificate, referred to by diamond grading laboratories as a grading report.


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