This beautiful natural Swiss blue topaz was once set into a a white gold setting that I wore on a white gold chain. Measures 10 mm x 8 mm. (My former husband was a jeweler.) I no longer wear jewelry and am listing my loose stones on multiple sites for a very reasonable amount. (First come, first serve.) Kay Jewelers wanted $ 165 appraisal fee for each item I have. I am retired and cannot afford to have each of my loose stones appraised. I am hoping someone will enjoy this beauty! FREE shipping from a pet free and smoke free home. Any questions, please ask