Native American Sterling Silver Lab Opal Ring - Size 8.5

In a Native American design, here's a Sterling Silver (hallmarked as pictured) ring featuring a "ribbed cylinder" inlay of black lab opal to the top. Width of the piece is 5/16" north/south at the top. Ring size is 8.5 on my sizer. Weight is 4.3 grams. Condition is very fine with no problems I can spot. Deep dark blue coloring to the stone - a breathtaking color that I am sure will appeal to someone.