“Cigar Ring”, just like the paper rings on cigars Gorgeous Royston Ribbon Absolutely the most Beautiful Size 7 1/2 Sterling Silver Still a working mine in Nevada Royston Ribbon Turquoise is a unique, highly valued, and scarce form of Nevada-mined boulder turquoise. Characterized by thin, vibrant veins of blue or green running through a, usually, brown or tan host rock, it is often cut to highlight the striking, striped, or "ribbon" pattern. It originates from the Royston district and is prized in sterling silver jewelry.