UNIQUE 18K 20 CT FINE SUGARLOAF CHALCEDONY NECKLACE: Elegant light green 20 CT sugarloaf chalcedony cabochon is featured in an 18K florentined bezel set pendent on a 16'' Chopard double strand chain, can be worn as a 32'' sautoir, 19.5 grams. Necklace is marked 750 Chopard.