Shop › Royston Turquoise TC#538 Image 1 of 2 Image 2 of 2 Royston Turquoise TC#538 $60.00 Royston turquoise cabochon. Backed with black epoxy and ready to be set in jewelry. Weight 38 carats Add To Cart Added! Royston turquoise cabochon. Backed with black epoxy and ready to be set in jewelry. Weight 38 carats