Natural opal brilliance is very precious, but it is easy to disappear due to moisture. Please keep it in the zipper bag of the desiccant to make the opal reply. It is stored in the shade to avoid direct sunlight. The high temperature makes the opal yellow. Lost gloss. Metal material uses 925 silver. After wearing it, please store it in a dry place or use a zipper bag to protect the air from darkening and tarnishing.