Beautiful and serene blue opal petrified wood with tiny hints of copper peaking out. They are set in sterling silver, with fine silver bezels and 18k, oxidized with French hooks. The size of the earrings are 2 1/8 x 1. Please note the fine silver bezels 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.