Arizona Turquoise Earring. These earrings feature 7mm x 5mm American Mined™ Arizona Turquoise cabochons, bezel mounted in 14/20 Gold Filled bezels. The Lever-backs are 14K Gold Filled as well. Includes a polishing cloth for all jewelry. 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. Gold filled "14/20" refers to the industry shorthand describing the resulting material. The first number is the karat purity of the gold used; the second number is the amount, by weight, of gold to the substrate material. "14/20" gold-filled material is made with 14-karat gold and the gold represents 1/20th (or 5%) of the total weight of the material.