Special Ring Mexican Opal Blue Red Antique Silver Crown Setting The depicted ring is handmade in our Cologne studio. Setting: Antique silver-plated tombac. Inserted stone: Handcrafted glass from the 1960s. Stone size: Approx. 18 mm Ring band: Adjustable size. Color: Blue, red iridescent Brand: SoHo® All steps are carried out by hand under fair conditions. Unique pieces with possible color variations.