Antique Art Deco Amethyst and Diamond Drop Earrings

A pair of antique Art Deco amethyst and diamond drop earrings, with Edwardian-cut diamonds in the tops, with thirteen, round brilliant-cut diamonds, in each, in articulating, millegrain edged, rub over settings, with caps set with rose-cut diamonds and briolette-cut amethyst drops, studded with diamonds, in rub over settings, mounted in platinum, with 14ct white gold butterfly backs.
Length approximately 60mm x width 13mm