Genuine Royston Turquoise set in Sterling Silver Pendant. Beautiful Turquoise Stone. Created by Navajo Artist Phillip Sanchez. Signed by the artist. Royston Turquoise Mine was originally known as the Royal Blue Mine. It produces Turquoise that has a mixture of blues and greens in the same formation. The Royston Turquoise Mine is located in Nye County, Nevada. Free 18 inch Sterling Silver Chain with purchase of pendant.