Monday, 12 March 2018

Coloured Diamonds

Less than one in 10,000 gem-quality diamonds is classified as ‘fancy-coloured’. The various colours are formed under unique conditions involving specific trace elements, radiation and/or plastic deformation of the crystal structure.
Fancy yellow and browns are more abundant than other hues. Rarest is the red diamond. Classified according to their hue, tone and saturation, the value of coloured stones generally increases with the strength and purity of the colour. Even very slight colour differences can have a profound effect on price.