Every product has its own color or color combination which can be described in terms of hue, lightness and saturation. Color provides a unique appearance to the product.

Every colored gemstone has its own color range, as per hue (The first impression of an object�s basic color), tone (Degree of darkness or lightness of a color) and saturation (A color�s strength or intensity). Color of the gem plays an essential role in determining its value.