Arizona Mined Turquoise Cross Necklace. This necklace features a genuine 3 mm Arizona Mined Turquoise Cabochon set in a 925 Sterling Silver Cross. The Cross measures approximately 1-1/8" tall and 7/8" wide. The chain is a 1.3 mm Flat Oval Cable Chain of Rhodium Plated Sterling Silver for greater tarnish resistance. Select 16 or 18 inch chain length. Includes polishing cloth. Shipped in gift box. With the Sleeping Beauty mine long closed, American Mined Arizona Turquoise, mined in nearby Arizona regions, offers the same classic sky-blue hue and minimal matrix. Turquoise is one of the birthstones for December.