Pearl has long been highly prized, due to its iridescent beauty and rarity. Its name is derived from the Old French word 'perle' meaning leg, as the shells in which pearls form have a shape similar to a leg of meat.
Natural pearls are formed by chance in nature, when the mantle of an oyster is damaged. In response, the mantle tissue of the mollusk secretes nacre (mother of pearl) into the pearl sac, a cyst that forms during the healing process. The largest known natural pearl in the world is known as Pearl of Lao Tze. It