The Four C's - Cut
When choosing a diamond you will more than likely be told about the 4 C’s. These relate to Cut, Colour, Clarity and Carat weight, and are classifications that are used to categorise diamonds, and to help define their true beauty.
A diamond’s natural beauty is only demonstrated by how it interacts with light. When light strikes the top of the diamond, also known as the crown, some of the light will be reflected back to you in a phenomenon known as external reflection. The rest of the light will penetrate the diamond and will be bent, or refracted, towards the centre of the stone. Internal reflection then occurs, when the light is bounced around inside the diamond, before emerging again through the crown, where it will be dispersed into the colours of the rainbow.
A well cut diamond will ensure that the majority of light that enters the stone will be reflected back through the crown, making it sparkle. Stones that have either been cut too deep (to make them heavier) or too shallow (to make them bigger), will allow light to escape through the sides or to be lost through the bottom, making the stone look dull or even black in the centre.
“All you need to do is look at your diamond. Does it appear white and bright? Move it about in the light and see if flashes of rainbow colours dance on the surface. You’ll recognise a well cut diamond instantly; it’s the one that will”
When looking at diamonds, you will hear the terms Fire, Brilliance and Scintillation. These all relate to the quality of the diamond’s cut, and are easy for you to see for yourself as you look at your diamond. Brightness relates to the internal and external white light reflected from the diamond. Fire is the scattering of white light into all the colour of the rainbow, and Scintillation is the amount of sparkle your diamond produces. All you need to do is look at your diamond. Does it appear white and bright? Move it about in the light and see if flashes of rainbow colours dance on the surface. You’ll recognise a well cut diamond instantly; it’s the one that will take your breath away.