Pearl necklace symbolizes elegance and classic sophistication. The price of a pearl necklace depends on the quality of its pearls. Saltwater pearls are generally more expensive than freshwater ones, which are cultured. The sheen and the thickness of the pearls' nacre also affect the price, as well as the size and roundness of the pearls themselves. Pearl necklaces of various colors are available on the market. Smaller pearls in light hues of blue or pink are usually more suitable for young children, while the creamier, ivory-toned pearls are preferred by older women. Jewelry pieces made from black pearls are very, very expensive, since these pearls are so rare. Pearls used in necklaces are sometimes set in gold, silver or platinum. Some designers also mix pearls with other gems to create a unique effect. Pearl necklace goes with a variety of outfits, from casual day wear to formal evening attire.