Referred to as either Sonora Sunrise or Sonora Sunset, the actual stone is made from 3 different types of stone: green chrysocolla and bright red cuprite with black iron or iron oxide matrix. I hand cut and polished this amazing stone large to get the most out of it, then wrapped it in .925 Sterling wire. It is 3 7/8" by 1 3/4" and can be worn by either a man or woman. It looks great on a silver neck collar, a chunky chain, or leather lacing. I have a separate listing to make cords or basic chains for you.