1960’s vintage green turquoise ring, set in sterling. Simply stunning and rare.

From my mother’s estate. 1960’s. My research leads me to believe this is a Royston Turquoise with iron pyrite stone set in sterling. Makers Mark V. Stone measures 1 7/8” x 3/4” width. One flaw in braid in sterling is missing. Should be visible in last photo. This ring is size 9. Simply stunning.