Colour

cut

colour

clarity

carat

shape

The degree to which a diamond is colourless.

Colourless diamonds are more valuable as they permit the most refraction of light, and thereby sparkle. Off white diamonds absorb light, inhibiting brilliance.

White diamonds are graded on a scale established by the Gemological Institute of America (GIA) which ranges from D (colourless) to Z. Differences between one grade is very subtle.