But how do we actually view colour in a diamond?
When light enters our diamond a process called selective absorption occurs. Selective absorption is what offers colours to all things. With diamonds it does this when visible white light enters the diamond enabling the gem to absorb some of the wavelengths, while also transmitting wavelengths to the viewers eye. Absorption bands or lines in the spectrum of of an incandescent source are seen through the absorbing medium - the diamond.
If little or no colour is absorbed by an object then it appears colourless or white. On the other hand if the entire spectrum of colours is absorbed, the object will appear black. In-between there are an infinite number of colour possibilities.
In diamonds it is the presence of nitrogen atoms (or other atoms of impurity) which determines the level of absorption, and therefore the color of the diamond. The less impurities there are in your diamond the whiter or more colourless it will appear.
D colour diamonds are very rare but we specialize in providing our clients with these very rare GIA certified diamonds.