Color
Color refers to the natural body color of a diamond and not to the reflection of spectral colors that flash when a diamond moves. Most diamonds naturally exhibit slight hints of yellow, brown, or gray. This color is caused by natural trace elements of nitrogen that were present when the diamond formed under the Earth’s crust. The less color a diamond exhibits, the higher the rarity, and therefore the higher the value. After cut, color is the next most important characteristic to consider when choosing a diamond.
Diamonds with less color allow more light to pass, releasing more brilliance and fire. A diamond acts as a prism by dividing light into a spectrum of color this refers to the degree to which a diamond is colourless.
The international gemological color scale begins with the highest rating of D for colorless, and travels down the alphabet to grade stones with traces of very faint or light yellowish or brownish color. Diamonds with grades D through F are considered "colorless," G through J are considered "near-colorless," K through M are "slightly yellow," and N through Y are referred to as “light yellow or brown.” Brilliant Earth only carries diamonds of superior color, ranged D-J.