Black Onyx Rocker Ring — .925 Sterling Silver, 23gA flat black stone filling the center of a wide silver frame no facets, no sparkle, just a polished dark surface that absorbs light instead of reflecting it. The Black Onyx Rocker Ring is . 925 sterling silver at 23 grams with a 2225mm face. The onyx is genuine a natural stone, not glass with the kind of deep, pure black that makes the surrounding silver look even brighter by contrast. Built For If you like dark stones without the flash of gems Onyx