Antique American Indian Art, LLC. Navajo Oval Turquoise Cabochon on Sterling Silver Pendant with Stamp Work. Estate Jewelry; Late 20th Century: unsigned; 1 7/8″ H x 1″ W. We are confident that you will be pleased with the value, service and peace-of-mind that our gallery can offer you. Thank you for looking! We will be adding lots of quality Antique American Indian Art over the next few months.