Amazing modernist necklace by Tiffany & Co., New York City, circa 1984-1990, crafted in solid 18K yellow gold and platinum with high polish. Features a central natural Brazilian vivid blue aquamarine (rectangular step cut, 15 x 20 x 6 mm, approx. 24.21 ct) surrounded by 118 pavé-set round brilliant diamonds (2.36 ct, E/F color, VS clarity). Measures 26 x 31 x 9 mm (1.02 x 1.22 x 0.36 in), total length 17.5 inches, weighing 81.95 grams. Fitted with concealed push box lock and hinged figure-8 safety clasp. Stamped with maker’s mark, gold and platinum assay marks, and signed “TIFFANY & CO. HANDMADE 18KT PLATINUM.” 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 an appraisal. This will carry an additional cost. Appraisals are made by our in house GIA certified Gemologist.