Genuine 7.5 - 8mm Round 3A White Freshwater Pearl 18K Gold Mount Pendant With 925 Sterling Silver Chain Necklace Brand New 7.5 - 8mm Round Cultured Freshwater Pearl 3A White color 18K Real Gold stamped mount pendant 925 Sterling Silver chain 17.5-18in Tarnish Resistant Comes in a box Pearls are the only gems that are produced by an animal. Cultivators mimic the way natural, uncultured pearls are created by implanting a beadlike nucleus from a mollusk shell into an oyster, and the animal responds to the irritant by coating it with a pearlescent nacre of calcium carbonate, layer by layer, multiple times per day. In this article the sizes and shapes of freshwater cultured pearls are approximate, therefore no claims are accepted for this reason. To preserve this jewel, it is recommended not to expose it to direct contact with creams and perfumes.