These hummingbird earrings are beautifully inlaid with black resin and man-made opal, which is more durable and consistent in color than natural opal. This color contrast gives this piece a unique and pretty look. Sterling-silver shepherds hook ear wires. Made in USA. Dimensions: 3/4L x 5/8W. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Earrings.