The sister ring is sold separately in another listing, but I have included a pic of both together. This one I believe is Chrysoprase but the stone is not tested. Two spheres, one larger than the other, are caged in sterling. Size 5 1/2 but could be carefully adjusted up slightly. Not signed but clearly a studio piece. Unmarked but tested sterling. 1950's-1970's Please message me with any questions. Bundle for a discount.