No two diamonds are exactly alike. Each one is unique. This is why over the years a universal standard for identifying diamonds has been set. The quality and value of a diamond is defined according to the 4 Cs: carat, colour, clarity and cut.
A common misunderstanding is that the term ‘diamond cut’ also refers to the diamond’s shape. Cut is what determines how well-cut your diamond is, whereas shape is the form into which it was cut. Diamonds can be cut into various shapes, the best-known of which is probably the round brilliant.
Natural diamonds are created by geological processes. They are formed at extremely high temperatures and pressure at depths of hundreds of kilometres in the earth’s mantle. Most diamonds found in nature are over 1 billion years old and extremely rare. In a typical mine, 100 tons of rock needs to be processed in order to find a diamond larger than 1 carat. It takes time and effort to enjoy these pure wonders of nature we cherish so dearly.
Types of diamonds
A diamond with a perfect crystal lattice made entirely of carbon would be completely colourless. In reality, however, all diamond crystals contain atomic impurities and structural imperfections. We call these ‘colour centres’ because they are responsible for the colour of a diamond. The most common atomic impurity in a diamond is nitrogen. Based on the presence of this atom in the diamond lattice, one can classify diamonds into two main groups. Type I diamonds contain a higher level of nitrogen, while type II diamonds contain practically no nitrogen.
Fancy Colour Diamonds
Diamonds can occur in all sorts of colours. If a diamond shows a colour other than light yellow or light brown in the face-up position, we call it a ‘fancy colour diamond’. Many of these fancy diamonds are quite rare, especially the red, green, and blue ones.
Grading fancy colour diamonds is very complicated. They are mainly valued for the intensity and distribution of their colour, but cut and carat are also taken into consideration. Our expert gemologists analyse the diamond in detail in order to deliver an accurate Natural Diamond Colour Grading Report.