Diamonds range in color from icy winter white to warm golden yellow and are graded on a color scale (illustrated below) that was established by the Gemological Institute of America (GIA). The color differences between grades may seem subtle at times, but they can have a profound impact on the diamond’s beauty, rarity and value.
Colored diamonds – known as “fancy color diamonds” in the trade – are among the rarest of nature’s gem treasures. At the present time, fancy color diamond output is estimated at 1 to 2 carats out of every 3,000 carats mined. Of all colored diamonds mined, 80% 90% are in in the brown and yellow family with the rarest having hues of red, pink, and blue.