Tribal First Nation Earrings, Hammered Pierced

Beautiful dangled pierced earrings, made from silver, etched, detailed and hammered metal. Signed Venue, USA on back. They were made approx. in 60s and have a tribal look. The green stone looks like malachite, but I can not be sure. May be it is just Lucite which looks like gemstone. Any case, they are really amazing. Size ~ 4.2 cm x 1.5 cm Weight ~ 12 g