Sterling silver and 18kt gold over sterling silver, omega for women. Chain size - 2 mm. Lobster clasp has a spring mechanism for sturdy security. Polished sterling silver and 18kt gold over sterling silver. Crafted in Italy. Includes jewelry presentation box. A trusted jeweler in 1952, Ross-Simons is dedicated to quality and value. An always elegant look from Italy, our modern 2mm omega chain necklace is sleek and right on trend. Crafted of polished sterling silver and 18kt yellow gold over sterling silver, this reversible style can transform your look in an instant! Lobster clasp, reversible 18kt yellow gold over sterling silver and sterling silver omega necklace.