Genuine and authentic Onyx bracelet hand stamped by the artist in Mexico. Black Onyx is widely revered as a powerful protection stone. ✦ Measures 6 inches long x .75 inches tall / Sterling Silver ✦ One-of-a-Kind Vintage ✦ Stamped *0925 TS-30 *Please note the natural patina on the silver. This can be buffed shiny again but we never clean antique jewelry as collectors prefer to see the age.