The Silver Legends Four-Channel Opal Ring is a unique and beautiful sterling silver ring. Inlaid with man-made blue, green, pink and white opal. This type of opal is more durable and has color consistency superior to that of natural opal. Made in USA. 1/4L x 3/4W. Whole sizes: 4-10. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Rings.