A Beautiful Green Royston Turquoise Triangular Cabochon for yourJewelry Designs or Turquoise Collections. R182 This is a very nice Dark Green Royston Turquoise Cabochon would be a beautiful in any type of jewelry design but especially a pendant or ring. Handcrafted One of a Kind Unique Item Triangular Shape Beautiful Green Color 14 Carats Measures Approximately 22 millimeters in Length by 16 millimeters in Width Lightly Backed Professionally Cut by Master Turquoise Cutter Garrett McGinnis in Manassa Colorado Mined in Nevada USA 100% Made in The USA The Royston Turquoise Mine is the oldest Patented Turquoise Mine in Nevada. become the most famous Turquoise Mine in Nevada. Located in the Royston Mining District outside Tonopah Nevada. Royston Turquoise is a favorite among Silversmiths, Jewelry Designers and Collectors because of the wide spectrum of colors it produces from Light Blue to Dark Green.