Natural Black Onyx Agate Ring Carved black unisex ring Natural Agate Band Ring Genuine Gemstone crystal Rings Carved Stone Onyx Band color: Black Agate: It is a jade-like gem The ancients regarded it as a sacred object to ward off evil. It is rich in natural gas. It has excellent effects on regulating nerves, enhancing memory, improving sleepy eyes, and maintaining vigorous energy. Weight: 10.5g