The Royston turquoise mine is located near Tonopah, Nevada. This mining claim produces beautiful turquoise ranging from dark green to vibrant blue. Many Royston turquoise stones can contain both greens and blues in the same cut. The host rock / matrix in Rosyton turquoise is often a deep brown or golden brown hue. The Royston Mine is owned by the Otteson family and continue to produce high quality natural turquoise.