Vintage Gold Chartreuse Green Gem Stud Earrings

Found these earrings at a local thrift shop in Manhattan. I am not sure the brand or the age of them but they are in great condition. Remind me of a pair of costume jewelry - but they are incredibly lightweight (unlike other custom jewelry). Material: Unsure, I have sensitive ears and mine have not been bothered by these at all! Size: - Diameter = 25mm (1") Width = 12mm (0.75”) Depth = 5mm (0.375”) Condition: - Slightly Worn, in great condition Cleaned, polished, disinfected and ready to ship!