This is an exceptional geometric cocktail ring created in New York City by the American jewelry designers of Hammerman Brothers, back in the 1970. This fabulous ring was designed with bold geometric modernist patterns with several rectangular and squares volumes. The sculptural ring was carefully crafted in solid yellow gold of 18 karats with high polished finish and embellished with a great assortment of 70 calibrated round brilliant cut diamonds, with a total weight of about 3.54 carats, white colorless E/F color, VS clarity. Weight: 23.80 Grams, (15.30 Dwt.). Size: 5 and may be sized up or down on special request. Measures: 26 mm by 18 mm (1.02 x 0.71 Inches) and raise 11 mm over the finger. Hallmarks: Stamped with the maker's mark, the designer's logo, the mark for the assay and warranty of the .750/.999 gold and signed as follows, "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.