Hand formed sterling silver hoops, hammered for texture on the bottom half, with Czech alexandrite color cathedral beads. These beads do change color under different lights. The fist picture was taken with just 5000K lamps while the second combines those lamps and a bit of stray natural sunlight.

Diameter is 7/8 of an inch for the smaller pair a hair over 1 inch for the larger pair. I also have one in the small size using a smaller size alexandrite cathedral beads.