Opal Silver Gold Ring - Your thoughts.Your thoughts This is a magnificent ring. The design is first formed in wax to create a stylish and chunky band which is then cast in silver and oxidized to really show off the texture. The wildly iridescent tiny lab grown opal is inlaid in a yellow gold carrier that emphasizes the charming stone, whose brilliance and vibrant colors resemble the colors of the fall. R1513GA. Construction & Dimensions Sterling silver, 10k yellow gold, lab grown opal.