Royston turquoise comes from a group of mines in Nevada, which includes Bunker Hill mine, Oscar Wehrend, and Royal Blue.High grade Royston is a very hard, collectible material, with an amazing color range. Royston comes in light blue to dark blue, anda full range of deep mossy greens. The matrix will have various shades of brown.Today the mining district is still producing turquoise. Lynn Otteson has been mining Royston Turquoise since 1958, and today Tom and Danny Otteson still mine this district.