A colored diamond is a type of diamond that exhibits hues beyond the traditional clear or white appearance. These diamonds can come in a variety of colors, including blue, pink, yellow, and green, among others. The color is caused by the presence of certain elements or structural defects within the diamond's crystal lattice. The value of colored diamonds often depends on the intensity and rarity of their color. For example, pink diamonds are particularly sought after and can be significantly more expensive than their colorless counterparts. The grading of colored diamonds is based on hue, tone, and saturation, which helps determine their quality and market value.