Color in the diamond trade usually refers to the amount of yellow in a stone, but can also indicate brown or gray and sometimes all three. The most treasured diamond color is actually the "colorless" grade -- one without any
color at all.
Let's take a look to cover color in detail to understand how it affects the price.
Colorless diamonds are the most desirable since they allow the most refraction of light (sparkle). The light that enters a diamond is split into the rainbow spectrum of colors, which are reflected throughout the gem. These
colorful splashes are collectively called fire. Entirely colorless diamonds will exhibit fire in all the colors of the rainbow. The more color a diamond has, the lesser colors there will be in the fire which itself will
be slightly dimmed. Off white diamonds absorb light, inhibiting brilliance.
Diamonds are also found in a variety of other colors such as blue, green, yellow, orange, pink or, rarest of all red. Diamonds with distinct tints other than those of the normal color range are classified as fancy colors. All
such colored diamonds are very rare and valued.
Diamonds are graded on a color scale, which ranges from D (colorless) to Z.