Coral is neither a mined stone nor a mineral, it is an organic gemstone formed from the skeleton of an individual polyps (plant like animals), which live in colony deep under the water of sea. It is one of the most precious gifts from the sea that mankind could ever have. Red coral is said to be the finest quality coral which has a heavy demand in jewellery industry. Red coral is found in almost all oceanic parts of the world. However, the largest deposit of coral is found in the Great Barrier Reef in Australia. Coral is always found in clear and shallow sea water, at about 15ft to 160 ft deep into the sea. The red corals found in greater depth are lighter in color and more