Spectacular Vintage Artisan Sterling Marcasite Amethyst And Glass Pierced Earrings (A2615)

These are truly wonderful. Signed on the back, definitely older, workmanship is fantastic, loaded with detail, fabulous deco design. They measure 1". The black is glass, the purple is most probably amethyst, I did check it with the presidium tester, and it is right between the edge of glass and amethyst, but I really believe they are amethyst.