Yellow diamonds, behind brown diamonds, are the most abundant of the fancy coloured diamonds. Achieving their colour from the concentration of nitrogen in the atomic structure these stones can achieve extremely high degrees of saturation.
GIA awards the highest grades to diamonds with both high saturation and a low amount of tone. The term “canary” has been adopted by the trade as well as the public to describe a yellow diamond and “zimey” to describe the strongest of vivid yellows.
Yellow can be modified by the hues brown, orange and green. Brown is considered a great deterrent to the value of the stone with orange and green sometimes considered an advantage.
Still strait yellows especially in strong saturation grades are rare and valued highly. Yellow differs from other colours in that their exists a wide range of colour in the highest GIA grade, vivid yellow.