Beautiful and serene one of a kind Boulder Opal ring. Glorious depths of colors. The materials are sterling silver, Boulder Opal, fine silver bezel, 18k. all is oxidized. The surface size is 1 1/4 x 3/4. The Ring size is 7 1/4 Please note, the fine silver bezel can take on a golden glow from the oxidation process. For care, please do not use a polishing cloth as that can alter the patina. You can swish in warm sudsy water, rinse and dry.