It is a compound of calcium & oxygen.Natural pearls are the most valuable as they are the rarest & produced in small quantities. Cultured pearls will usually be less expensive, as they are more available, but may also be expensive depending on their fineness. Pearl belongs to the 'Moon' & the zodiac sign 'Cancer'. Pearl gemstone is available in various colours. The rain drops, falling in to the mouth of pearl oysters in the coursework of the 'Swati Nakshatra' solidities them in to pearls. But the increasing demand & attraction towards Pearl gemstones have inspired the scientists to provide us with a massive number of cultured pearls. Now-a-days with modern know-how, substances similar to rain drops in the coursework of the 'Swati Nakashtra' are infused in to 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 actual, & cultured pearls. Therefore, there is no difference between their importance. Pearl gemstone availability in a massive number has decreased its cost in the market. Thus, Pearl gem has acquired popularity in the society.
Moon is the presiding deity of the element water, & rules over the tides of the sea. The sphere of the Moon is the reservoir of rainwater & thus Moon is the ruler of plants & the vegetable kingdom.Moon represents the brother or female principle, the energy that creates & preserves. The colour of Moon is white. Its nature is mucus dominated, tenderhearted, wise & learned. It rules the peace of mind, comfort, general well being & also the fortune of a person. The gem stone related to Moon is Pearl/Moti . Moti or Pearl is a kind of stone.