RG6315 Montana Silversmiths Spirit of the Sky RingMontana Silversmiths Spirit of the Sky Ring. Soar to new heights with the Spirit of the Sky Ring. Black paint antiquing adds depth and character to the thunderbird and in the center is a crafted turquoise stone. This ring features an open back for one size fits most. Blends traditional craftsmanship with contemporary style. Width: 0. 5; Height: 0. 1; Length: 0. 1 Materials: Sterling silver. Crafted turquoise. Paint. Montana Armor to prevent tarnish.