If you are planning to buy a pearl diamond wedding ring, you need to realize that the ring requires a greater deal of care and maintenance to keep up its natural elegance and shine. Customers who take such good care of their pearl diamond rings would be able to wear it for a lifetime or more. Pearls have been associated with purity, wisdom, honesty, spirituality, and the moon. It is believed that pearls imbue the qualities of wisdom, honesty, and purity in their wearers. There are plenty of different types of pearls available in the market. However, the most commonly purchased ones are freshwater pearls, saltwater pearls, cultured pearls, and natural pearls. Natural pearls are the most highly valued type of pearl, because of their supreme rarity. Diamond ring manufacturers generally use cultured pearls to design engagement rings and other pieces of jewelry.