Blackened or oxidized Sterling Silver is sterling that has been darkened by a surface treatment process which does not change the properties of the Sterling Silver but gives it the look of metal that has tarnished over time.
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, and a full range of deep mossy greens. The matrix will have various shades of brown. Today the mining district is still producing turquoise.
Authentic Handmade Native American Jewelry