Geometric cocktail ring designed by Cartier. All is about geometry and volumes in this rare cocktail ring. This ring is attributed to Roger Lucas for the jewelry house of Cartier back in the 1970 and carefully crafted with a bold massive look in solid yellow gold of 18 karats with high polished finish. It is topped with three platinum parts, which are embellished with a great arrangement of thirty two natural earth mined diamonds. A very unusual and one of a kind statement ring, with great eye appeal. History This piece it belongs to the period of 1968 and 1970. In 1969, Michael Thomas became president of the New York City branch and was instrumental in hiring young designers who modernized the company’s lines such Cesar, Aldo Cipullo, Jean Dinh Van, Roger Lucas, Jean Mahie, and Lisa Sotilis. On October 03,1969, Cartier launched a collection of about 200 jewelry pieces entitled, Astrological, Underwater and Geometric, all designed by these young designers. This unique piece could be part of the pieces exhibited in that event in the 1970. Diamonds: Mount in a pave setting, with 32 round brilliant cut diamonds, 1.60 carats, white colorless F color, VS-1 clarity. Birthstone: Diamonds for the month of April. Weight: 20.2 Grams, (12.95 Dwt). Size: 5.75 and may be easily sized on request. Measurements: 21 mm by 13 mm (0.83 x 0.51 Inches) and raise 11.5 mm over the finger. Hallmarks: Stamped with the maker's mark, the mark for the assay of the gold, the f