Roystone turquoise is known for its beautiful deep green rich light blue colors. These unique color ranges ae what makes the stone so special. Roystone stones are often two tone displaying both dark and light green and sometimes blue. Roystone has a heavy matrix ranging from brown to gold in color. Royston Turquoise comes from the Royston mining district located near Tonopah, Nevada and has been mined since the early 1900s. "Royston Turquoise" originally consisted of four old Turquoise claims located within the Royston range: Bunker Hill, Easter Blue, Oscar Wehrend, and Royal Blue.