Archives For the four c’s

How to choose a Diamond

mcc —  September 19, 2013

Jewellery latest have been offering advice on how to buy a diamond. There a four categories which ave been written about here and here.

The final category is Carat weight.

Carat Weight
A carat is the unit by which a diamond is measured. With diamonds bigger is indeed better but mainly because large diamonds are much less common than small diamonds. Large diamonds are much more expensive than smaller ones. Here are some hints to help you decide what size of diamond to buy.

  • Determine your budget.
  • Deciding on carat size is really about striking a balance between size and quality. If you are looking for a larger stone you may need to compromise on the clarity and cut in order to make it affordable and vice versa.
  • Try on different sizes and see what suits best. If it is a diamond ring, slender fingers make a diamond look bigger. Your jeweller can offer you advice.
  • Think about what sort of setting will hold the diamond. You’ll have to be sure that the setting you choose is made to fit the carat weight of your diamond.

There is also a Fifth C when you are serious about buying diamonds, Certificates. A grading report or diamond certificate should be available to allow you to make sure you have bought the right diamond for you.
Whether it is a gift, heirloom or for you engagement or wedding, Robert Adair Jewellers can help you find your perfect diamond.

We are located at Diamond House, 47-51 Mill Street, Ballymena.

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Visit the Robert Adair Jewellers showroom at Mill Street in Ballymena.

How to choose a Diamond

mcc —  September 13, 2013

Jewellery Latest offer advice on how to spot a good diamond. Cut is the most important factor as discussed here.

The “four Cs” of diamonds which are considered the most important grades and categories:

  • Cut
  • Clarity
  • Colour
  • Carat weight


Because Diamond is a natural substance it can form with flaws, blemishes or inclusions. For the best diamond it should have as few flaws a as possible. The number and size of inclusions or blemishes can effect the grade of the diamond. Most flaws are invisible to the naked eye but can stop light from reflecting perfectly off the cut surfaces of the diamond. Diamonds are graded for clarity under 10x loupe magnification.

  • F
    Flawless: No internal or external flaws. Extremely rare.
  • IF
    Internally Flawless: no internal flaws, but some surface flaws. Very rare.
  • VVS1-VVS2
    Very Very Slightly Included (two grades). Minute inclusions very difficult to detect under 10x magnification by a trained gemologist.
  • VS1-VS2
    Very Slightly Included (two grades). Minute inclusions seen only with difficulty under 10x magnification.
  • SI1-SI2
    Slightly Included (two grades). Minute inclusions more easily detected under 10x magnification.

Richard Burton famously gave Elizabeth taylor an internally flawless diamond in a ring setting called the Krupp Diamond.


While most of us could never buy a flawless diamond, a good jeweller should ensure that we get the best graded stone for our money. Robert Adair Jewellers can help you to buy the best diamond. Jewellery should be an investment.

We are located at Diamond House, 47-51 Mill Street, Ballymena.

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Call in to Robert Adair Jewellers to get advice on buying diamonds.