Red Coral is by far has more popularity of the types of Coral. It is popular because of its significance or importance in astrology.
Red Coral is associated with the planet Mars. Mars rules your physical strength. So, if you have a strong Mars in your chart, Red coral will give you the benefits from the favourable position of the planet. In case of weak or debilitated Mars, this gemstone is worn to improve the strength and position of the planet.