A pair of late 1970s gold interchangeable doorknocker hoop earrings, the ridged gold surmounts suspending ridged, bow-shaped hoop receivers; including larger hoops of chalcedony, chrysoprase, rock crystal, mother of pearl, hematite, and turquoise; and smaller hoops of chalcedony and chrysoprase; in 18k. Van Cleef & Arpels, France. Surmounts: #B3356R6 Gold hoops: #B3015 Z183