Rich opal green enamel paired with sterling silver makes these earrings colorful without getting fussy. In Opal Green Enamel and Sterling Silver Earrings, Daria Salus lets the shape, color, and materials carry the design. A good pair for anyone who wants color without going full rainbow. Opal Green Enamel and Sterling Silver Earrings puts the earring shape front and center, with copper, enamel, glass, and sterling silver giving the piece its character.