Coral, organic origin, in the form of coral, which only a few branched trunks are used in jewelry. It is found in the western Mediterranean, the Red Sea, the Bay of Biscay, the Canary Islands, the archipelago of Malaysia, Midway, Japan and Hawaii islands. The coral branches are harvested between 3 and 300 meters deep. After fishing, corals are stripped of their soft parts, and then sorted according to their quality. In its raw state, coral is dull; polished, it takes a vitreous luster.