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 If you’re buying your first diamond and you’re not sure what to look out for, all you have to do is remember the 4Cs – Cut, Colour, Clarity, and Carat – the universal method for assessing the quality of any diamond based on the Gemmological Institute of America (GIA).


1. Cut

The cut of a diamond is thought to be the most important “C” as it determines the brilliance and beauty of a diamond. When a diamond is cut perfectly to show off the light, there will be three effects:

Brilliance – which is the internal and external white light reflected from a diamond. When a diamond is well cut, the light is reflected perfectly against a symmetrical facet to give the maximum brilliance. Deep cut diamonds tend to have “dark shadows” in the diamond as the uneven light reflections can create dark areas within the precious stone.

 Fire – the scattering of white light into all the colours of the rainbow. This can be observed from the top of the diamond. It is more obvious when you move the diamond ring.

Scintillation – the amount of sparkle a diamond produces, and the pattern of light and dark areas caused by reflections within the diamond

 All 3 effects are best observed from the top of the diamond.


2. Colour

Some may wonder why is the best diamond colour D instead of A or 1. According to diamond grading history, there were many diamond companies who were using their own grading system. When GIA decided to standardize the colour grading, they started with D to avoid confusion with other colour grading systems.

 Colour of a diamond refers to how much a diamond tends towards colourlessness.  Diamonds can come in all colours like white, blue, black or yellow. A diamond’s colour will range from colourless (D grade) which is extremely rare and most valuable, to a yellowish (Z grade).

Here is the colour chart for easy reference:




3. Clarity

Clarity refers the degree to which tiny natural marks or inclusions are found in most diamonds. Those found inside the diamond are known as inclusions and are naturally formed. This can be used as an accurate indicator to determine the authenticity of a diamond. The flaws on the outside of a diamond are known as blemishes and can be man-made or naturally formed.

The grade ranges from the “Flawless” or FL to the lowest grade “Included 3” or SI3. The higher the diamond clarity, the higher price it will command as it has less visible flaws and considered more pure.

Here is a sample chart for diamond clarity.


4. Carat

Carat is the measure of a diamond’s weight. One carat is divided into 100 points. However the diamond carat does not determine the size of the diamond solely – the cut grade will matter too. But yes, as all would know, the bigger the carat, the more expensive the diamond ring is, that is for sure! Below is a sample formula for calculating carat weight:

1 carat = 0.2 grams = 100 pointers

0.01 carat = 1 pointer


With all these information, you will be better equipped to diamond shop and it will be far less intimidating to procure your perfect diamond ring. If you are interested in any pre-owned diamond solitaire rings, feel free to just click on our “Shop” link to view our amazing collection – all kept in pristine condition and at surprisingly cheap prices!