Jewelry Trends Sterling Silver Created Blue Opal Crescent Moon Pendant with Amethyst Purple CZ on Chain Necklace Pendant dimensions: 15.4 mm wide x 34.4 mm long Necklace dimensions: 0.8 mm wide x 18 inches long .925 Sterling Silver; High polish finish Lab Created Blue Opal Moon Pendant with a dangling pear shaped purple colored crystal displayed on a Sterling Silver box chain. Complimentary gift box included