Vintage Green Drop Earrings with seed Pearls Bronzy Sterling

Vintage gold tone earrings, I believe they are gold plated but base is sterling Green oval stones, may be aventurine (not sure) Tiny seed pearls at the tops Really gorgeous vintage earrings Need to be cleaned have accumulated some black substance as seen in photos I do think there is a stamp in the back but I can't make it out About 1" long k