4 C's of Diamonds
How a diamond handles light
Surprising to learn, diamonds are also available in a variety of colors including red, purple, pink, green, orange, yellow, blue, brown and black. These extremely rare and unique diamonds are termed "Fancy Colors" and are graded based on the hue, tone and saturation of their color. The more intense the color, the higher the rarity factor. The most rare of the fancy colors is red.