The diamond 4Cs

The diamond 4Cs

If you’re a traditional couple… and you’re waiting for your man to propose, there’s a high chance that they have been shopping for a ring and have NO IDEA what they are doing! So here are 4Cs of Diamonds that you’ll need to know about before buying “the ring”.

All this information is drawn from the Gemological Institute of America. A company who inspired the 4C’s and the International Diamond Grading System

Cut of Diamonds

Usually the cut of a diamond is associated with its shape (heart, pear, round…you can read more about diamond shapes here) but it’s actually not the case. The cut is really about how well a diamond’s facets interact with light. 

The use of high quality artistry and workmanship achieve better quality cut diamonds. They ‘fashion the diamonds using its proportions, symmetry and polish to deliver the magnificent return of light’… the sparkle that is only possible from a diamond. 

A diamond’s beauty and value is most determined by its cut. But out of the 4Cs, it’s cut is the most complex and technically difficult to analyse. 

The scale ranges from Excellent to Poor.

Colour of Diamonds

Funnily enough, this C is in relation to the ABSENCE of colour. The clearer the diamond is, the better the stone is to sparkle! 

A pure and structurally perfect diamond has to have no hue – like a drop of pure water. These diamonds usually cost much more though cuz they’re rarer!

The good news is that diamond colours are quite subtle and are near impossible to the untrained eye. So it might not matter much to you when buying a ring. It does, however, make a very big difference in diamond quality and price.

The scale ranges from D = Colourless to Z = Light.


Carat of Diamonds

The Carat of a diamond is determined by its weight. 200mgs is equal to 1 metric ‘carat’. 

And obviously, the larger the diamond, the more expensive, rare and desirable it is. Keep in mind though that a diamond with the same carat size may be different in cost. That’s because the price of a diamond is determined using all 4Cs and not just the weight of the diamond. 

Clarity of Diamonds

These stones are the natural result of carbon being exposed to tremendous heat and pressure deep inside the earth. Therefore, each diamond can have a result of varying ‘imperfections’ which is a diamonds’ clarity. 

There’s internal characteristics called ‘inclusions’ and external characteristics called ‘blemishes’ and each characteristic affects the transparency and brilliance of the diamond. The more a diamond doesn’t have either inclusions or blemishes – the higher quality of a diamond it is.

The scale ranges from FL = Flawless with no inclusions or blemishes visible to a skilled grader using 10x magnification to I3 = Included with inclusions and blemishes that are obvious under 10x magnification.


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