One set of sterling silver and 18k yellow gold blue chalcedony earrings by Lorenzo. The set features two genuine polished blue chalcedony gemstones bezel-set in .925 sterling silver and accented with 18k yellow gold. They attach with posts and have heavy-tension earring backs. This set also has a matching necklace and a matching ring, style numbers 509-23741 and 509-23750.