4C's - Colour


When jewellers speak of a diamond's colour, they are usually referring to the presence or absence of colour in white diamonds. Colour is a result of the composition of the diamond, and it never changes over time.
Because a colourless diamond, like a clear window, allows more light to pass through it than a coloured diamond, colourless diamonds emit more sparkle and fire. The formation process of a diamond ensures that only a few, rare diamonds are truly colourless. Thus the whiter a diamond's colour, the greater it's value.


NOTE: Fancy colour diamonds do not follow this rule. These diamonds, which are very rare and very expensive, can be any colour from blue to green to bright yellow. They are actually more valuable for their colour.

To grade 'whiteness' or colourlessness, most jewellers refer to GIA's professional colour scale that begins with the highest rating of D for colourless and travels down the alphabet to grade stones with traces of very faint or light yellowish or brownish colour. The colour scale continues all the way to Z.

Which Colour Grade Should I Choose?


What is Fluorescence?


For more information, view the video below.

This exert is from the GIA website