This exceptional geometric cocktail ring by Hammerman Brothers, New York City, circa 1970, features bold modernist patterns with rectangular and square volumes crafted in solid 18K yellow gold with high-polished finish, embellished with 70 calibrated round brilliant-cut diamonds (3.54 carats total, E/F color, VS clarity) in pavé settings, weighing 23.80 grams (15.30 dwt.) and measuring 26 x 18mm (1.02 x 0.71 inches) with 11mm rise over finger, size 5 (resizable upon request). Stamped with maker's mark and "HB 18KT" Very good conditions. All our diamonds and colored gemstones are naturally earth-mined. Any synthetic (lab-grown) stones will be clearly indicated in the description. Upon Request, Auction House may provide Ring resizing or/and appraisal. This will carry an additional cost. Appraisals are made by our in house GIA certified Gemologist.