Black Onyx Eagle Sterling Silver Ring. Made in United States. Rectangular Genuine Black Onyx Inlay. Weight is 10.5 to 10.9 Grams (varies with size). 3/4" Wide Across the Top. Stamped .925. This heavy band ring is crafted of sterling silver and inlaid with a rectangular piece of black onyx. Each side of the ring has a Native American stylized eagle emblem set in. About 3/4" wide across the top and tapers down to about 3/8 of an inch. Marked 925 for sterling silver.