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The 4Cs

Our ANTON natural diamonds are hand-selected for their magnificent qualities of brilliance, fire and scintillation. Sourced from all over the world, our talented team of gemologists and artisans carefully match each natural diamond to its unique design, creating the most captivating pieces that can only be ANTON.

Our ANTON signature pieces are issued with a report from the Gemological Institute of America (GIA), the leading organisation in setting the standards for the quality of diamonds. This report outlines the diamond’s characteristics in relation to four criteria. This is known as the 4Cs.


Starting with the most well-known of the 4Cs, Cut is probably the most complex to analyse. The Cut takes into account the quality of the cutting technique, and the ways in which a natural diamond interacts with light. This includes brightness (the white light), fire (the way the light scatters into colours of the rainbow) and scintillation (the amount of sparkle). Cut is often confused with shape (such as round, square, oval, pear etc), however you will only hear of Cut when talking about round brilliant cut diamonds. Fancy cut diamonds, such as oval, pears, and others, cannot be judged in this way, as they are truly unique. Cut is measured across five ratings from Excellent to Poor.


This guiding scale refers to how pure the colour is. The scale starts at D to represent the finest of white and ends in Z for a natural diamond colour that has a deep body colour or tint. The presence of colour is subtle, so it's important to understand the scale.

Natural diamonds rated D-H are considered the best in quality and beyond H you may see a slight tint of yellow or brown in the diamond. Beyond Z, the diamond is considered 'Fancy' and has a deep intensity of colour ranging from yellow, apricot, orange, mauve, blue, green and pink.


Carat is often referred to as the size of a natural diamond, however it actually refers to the diamond's weight. Every 0.2 of a gram is equivalent to 1 carat. Now, while you might think that the bigger the carat, the more expensive the diamond, this is not always the case. That's why it is important to understand all of the elements that make up the quality and value of a diamond.


Diamond Clarity simply refers to the internal and external cleanliness of a natural diamond. While it is very difficult to see with the naked eye, diamonds have inclusions or blemishes that may impact the way it will reflect the light. There are 6 categories used to measure Clarity (some of which are divided across numerous gradings). While no diamond can be considered perfect, if you come across a 'flawless' diamond, you will know you are in the presence of greatness! Flawless is the finest clarity grade there is.

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