mexico 950 vintage abalone stripe boho clip screwback boho earrings

vintage pair of abalone earrings. stamped 950 mexico i'm not sure if the yellow stones in the middle are supposed to be yellow or if they've yellowed over time -please note- these earrings are screwback clip ons. there is no post for pierced ears. ***these earrings are very tarnished & have some marks on them. could use some cleaning, but they're in nice secondhand condition overall. *** feel free to make an offer on one piece or multiple items in a bundle. all reasonable offers will be considered. thank you so much for looking. have a beautiful day🤍🤎