Moon is the presiding deity of the element water, and rules over the tides of the sea. The sphere of the Moon is the reservoir of rainwater and thus Moon is the ruler of plants and the vegetable kingdom. Moon represents the mother or female principle, the energy that creates and preserves. The color of Moon is white. Its nature is mucus dominated, tenderhearted, wise and learned. It rules the peace of mind, comfort, general well being and also the fortune of a person. The gem stone related to Moon is Pearl/Moti . Moti or Pearl is a kind of stone. It is a compound of calcium and oxygen. Natural pearls are the most valuable as they are the rarest and produced in small quantities. Cultured pearls will generally be less expensive, as they are more available, but also can be expensive depending on their fineness. Pearl belongs to the ‘Moon’ and the zodiac sign ‘Cancer’. Pearl gemstone is available in various colors. The rain drops, falling into the mouth of pearl oysters during the ‘Swati Nakshatra’ solidities them into pearls. But the increasing demand and attraction towards Pearl gemstones have inspired the scientists to provide us with a large number of cultured pearls. Now-a-days with modern technology, substances similar to rain drops during the ‘Swati Nakashtra’ are infused into the sea shells which in layer after layer of nacre, cover them with coral substance. These are called cultured Pearl gemstones. The same shell prepares both real, and cultured pearls. Therefore, there is no difference between their importance. Pearl gemstone availability in a large number has decreased its price in the market. Thus, Pearl gem has acquired popularity in the society.