This is a vintage ring made by John Brown. The ring features a boulder opal cabochon as the main stone, set in a brass bezel. The band is 5mm wide and is also made of brass. The ring is size 11.75 and can be worn by men. The opal is brown in color and is not enhanced. The ring is dome-shaped and has a band style. The total carat weight is 60.90. The ring is unique and was made in the United States.