Shop › Royston Turquoise TC#257 Image 1 of 2 Image 2 of 2 Royston Turquoise TC#257 $40.00 sold out Royston turquoise cabochon. Backed with black epoxy and ready to be set in jewelry. Weight 21 carats Sold Out Added! Royston turquoise cabochon. Backed with black epoxy and ready to be set in jewelry. Weight 21 carats