Natural diamonds are formed deep within the Earth under the extreme heat and pressure. Due to this process of creation, diamonds will carry a unique chemical structure based on the minerals present. Often, the minerals present during the formation process impacts the presence of color in the rough diamond material. Determining a diamond’s color grade is objectively grading the absence of naturally occurring color. A chemically pure and structurally perfect diamond will be completely colorless, like a pure, unadulterated drop of water. The purity of material is rare, which is why diamonds with high color grades are tremendously valued.