Er0129 These are vintage-style marcasite and black onyx earrings crafted in an ornate, floral-inspired Art Deco design. Design & MaterialsCenter Stone: A rectangular, bezel-set black onyx cabochon with a smooth, polished finish. Accent Stones: The surrounding scalloped flower petals are encrusted with tiny, metallic marcasite stones that provide a subtle, glittering contrast. Metalwork: Constructed from sterling silver (often stamped 925), featuring aged, oxidized detailing within the crevices to highlight the intricate textured filigree patterns. Closure Type: They feature a secure leverback clasp (also known as a German or European clasp) that hinges closed behind the earlobe for a flush, stable fit.