925S Genuine 10 mm Freshwater Pearl Adjustable Gold Ring With Leopard Design Brand New This ring is also available Silver tone. In my closet you will also find 925 Sterling earrings with pearls and cat shape. Main Stone:  White Freshwater Pearl Pearl Shape: Round Pearl Size:  10 mm Pearl Grade: AAA Good Luster, Nice Quality Main Material: 925 Sterling Silver Lead and Nickel free 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.