I believe this ring was purchased anytime from 1950-1970 it was bought for my grandmother by my grandfather so I know its old The opal is genuine and the gold is 10k yellow It has been professionally cleaned and the prongs have been checked and came back with no problems Right now the ring is a size 5 but I'm willing to have it professionally sized for an additional cost (I will have to know what size you need before updating the price) it really is a gorgeous ring but unfortunately I just can't bring myself to wear it let me know if you have any questions offers and bundles encouraged :) I have lots of other vintage costume jewelry for sale as well! *tagging Kay's for exposure, I doubt its from there*