Royston is one of the last remaining American mines operating today. From the Royston mining district located near Tonapah, Nevada. Royston Turquoise originally conssisted of four old claims. The Bunker Hill, The Easter Blue, The Oscar Wehrend and the Royal Blue. The Whole area is now being mined by the Otteson family. Royston Turquoise is considered to be quality Turquoise. The area produces many colors of Turquoise from blues to greens. Often the stones have blends of these colors which can make them very interesting.