Beautiful and very elegant classic white freshwater pearl necklace, with a nice 925 sterling silver decoration on the flower-shaped clasp. White Cultured Freshwater Pearl Length: 18 inches Pearl Shape: Button Approx Pearl Size:  7-8 mm, grade AAA Finding: 925 Sterling Silver Clasp Tarnish Resistant Will come 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. It is important to know that natural pearls are extra-sensitive to body creams, perfumes, hairdressing products such as hairspray and the like, so we advise you to put these products on before putting on earrings, necklaces or bracelets with pearls.