Leon Nussbaum, our London silversmith, handcrafts each pair of hoop earrings with a matrix of Mexican fire opal. Each of the panels in these sterling silver hoop earrings is inlaid with a mix of dazzling red, orange, and green hues produced by the diffraction of white light through a microstructure of silica spheres. Handcrafted from the heart and hands of the artisan exclusively for Uno Alla Volta. Leon's Mexican fire opal hoop earrings measure Approximately 0.75 inch in diameter, hinge clasp.