These are handmade Resin oxidized silver or silver-toned drop earrings with gold and silver foil  a rectangular resin-inlay design and small hanging metal accents (often referred to as jhumka or ghungroo details in Indian jewelry). 
The main features of the earrings include:
Material and Finish: The metal is an oxidized silver or brass, which gives it a darkened, antique, or vintage appearance.
Design: They feature a prominent rectangular drop section.
Inlay: The center of the rectangle contains a clear or white resin inlay with gold-colored flakes or foil embedded within it.
Hanging Details: The bottom edge of the earrings is adorned with small, decorative metal hangings, a common feature in traditional Indian jhumka style jewelry.