Leon Nussbaum, our London silversmith, handcrafts each pair of multi-circle earrings with a matrix of Mexican fire opal. Each of the panels in these sterling silver multi-circle 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 multi-circle Mexican fire opal earrings measure approximately 1.25 inches long, posts.