Very rare cocktail convertible ring, created in New York City at David Webb's jewelry workshop in the 1970's. This striking bombshell ring was crafted in solid 18K yellow gold with a high polished finish. Gemstones: The insert rings are mounted in a bezel setting, with 4 marquise cabochon cut (12 x 6 x 6 mm) carved from natural blue turquoise, salmon coral, blue lapis lazuli and green jade, with a combined weight of 12 carats. Weight: Combined weight of 39.95 Grams, (25.60 Dwt). Size: 6 and is sizeable. Measurements: From the top view is 24 mm by 24 mm (0.95 x 0.95 Inches) and raise 13 mm over the finger. Hallmarks: Stamped with the maker's mark, the mark for the assay of the gold and signed, "©DAVID WEBB 18KT". Very good conditions. 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.