Coral or Vidruma is another organic gem that comes from the sea. Corals are colonies of tiny living animals found in marine waters containing a few nutrients. Most coral reefs are built from stony corals and are formed by polyps that live together in groups. The polyps secrete a hard carbonate exoskeleton which provides support and protection for the body of each polyp. The most valued coral is the noble red coral on the left. (Corallicum rubrum). The color is uniform throughout with no pits or color streaks. Polished coral has a vitreous luster. Due to pollution, coral is an endangered species. Coral represents Mangal or Mars who rules over activity, energy, courage, ambition, sports, property, strength, military, technical ability, mechanical aptitude, forcefulness and bravery. In Jyotish, Mangal is known as the commander-in-chief, because of his ability in organizing and managing direction in all activities. Mars behaves like a General with his focus on precision and power in all activities. Whenever Mars rules over the first, fifth or the ninth house, he becomes capable of producing benefits. For Cancer and Leo ascendants Mars becomes a Yog Karak planet. In such cases wearing a Coral ring brings about very favorable results. If Mars becomes the lord of trik houses in the horoscope, one must never wear a Coral. It will only increase the problems being faced . Similarly Coral is not a remedy for Manglik Dosh.