HRD Grading Specialists

Our HRD diamond grading specialists will consider these 4 characteristics when evaluating diamonds to help you understand their worth and desirability. Before you purchase any diamond jewellery, you want to be certain that the diamonds are indeed authentic and valuable. Rebecca’s Jewellers can help by providing you with an HRD diamond grading report, designed to identify the 4Cs: Carat, Colour, Clarity and Cut.

We are in-store ready to answer any of your questions about diamond stones, whether that be window-shopping for your next purchase or that you’re looking to sell.

Get in touch with Rebecca’s Jewellers today for more information.

The 4Cs of Diamond Quality


The most appealing factor to most customers when buying diamonds are the carat weight.

Each diamond is measured in carats, which is considering the weight of the diamond rather than the size. Carats are split into points in which 100 points are equal to one carat so for example:

  • ½ carat diamond – 50 points or 0.50 carat diamond
  • ¼ carat diamond – 25 points or 0.25 carat diamond

However, the weight of the diamond is not the most important factor, as the colour, clarity and cut all impact on the brilliance and beauty overall.


Diamonds naturally vary in colour from colourless to a light yellow, in which a truly colourless diamond are treasured for their rarity. Most diamonds have subtle differences in colour which are not visible to the naked eye, but with Rebecca’s Jewellers diamond valuations, we can grade a diamond’s colour effortlessly. A diamond’s colour grade varies from:

  • Colourless (D, E and F)
  • Near Colourless (G, H, I and J)
  • Faint Yellow (K, L and M)
  • Very Light Yellow (N, O, P, Q and R)
  • Light Yellow (S to Z)

A diamond should look white or colourless to the naked eye, therefore any ‘colourless’ or ‘near colourless’ grade are the best to aim for.


Clarity is graded on a 10-point scale from flawless to inclusions 2, in which the clarity of a diamond is graded on how clean a diamond is from both inclusions and blemishes. The clarity grading we follow at Rebecca’s Jewellers is as follows:

  • FL (Flawless)
  • IF (Internally Flawless)
  • VVS1 (Very, Very Slightly Included 1)
  • VVS2 (Very, Very Slightly Included 2)
  • VS1 (Very Slightly Included 1)
  • VS2 (Very Slightly Included 2)
  • SI1 (Slightly Included 1)
  • SI2 (Slightly Included 2)
  • I1 (Inclusions 1)
  • I2 (Inclusions 2)

Inclusions and blemishes can affect the way a diamond’s appearance, beauty and interferes with light reflection. Therefore, the cleaner it appears upon look usually means the better the clarity.


Finally, the cut of a diamond refers to their symmetry, proportion and how polished a diamond is, which can have a direct impact on a diamond’s sparkle and overall aesthetic appeal.

A cut in a diamond varies significantly depending on the carat weight and if the clarity of the diamond needs improving, in which the cut can ultimately affect the beauty of diamond. A diamond can either be cut too shallow or too deep, therefore it is important to find the ideal cut diamond. Your diamond can either be an:

  • Excellent cut
  • Very good cut
  • Good cut
  • Fair cut
  • Poor cut

An excellent cut will ensure maximum fire and brilliance with your diamond, in which nearly all of the light that enters the diamond creates an exceptional sparkle.

You can arrange your HRD diamond valuation today – either give us a call on 01704 538011, contact us online or visit us in store at 319 Lord Street, Southport, Merseyside, PR8 1NH!