The 4 C's of Diamonds are Cut, Color, Clarity and Carat Weight.
A Diamond is a mineral made of carbon that is crystallized. In fact, a diamond is more than 99.95% pure carbon. The remaining 0.05 percent of the elements often influences the crystal's color and shape. The diamond is also, by far, the hardest natural substance known to man. Diamonds form between 75 and 120 miles below the earth's surface. The first diamond mines were discovered in India before 500 BC. India has been the world's major supplier of diamonds for over 2,000 years, producing some of the most famous diamonds.