Emerald and Diamond Studded Pendant in 18 Karat White Gold For Sale at 18 Karat Rose Gold Diamond and Emerald Pendant Necklase For Sale at 1stDibs Platinum, 18 Karat Gold, Emerald and Diamond Pendant, Van Cleef Modern 18 Karat White Gold Emerald and Diamond Statement Pendant and 18ct Yellow Gold Emerald and Diamond Pendant and Necklace For Sale at. A simple and elegant pendant set with a rectangular emerald measuring approximately 5 3 mm (estimated weight 0. 30 carats). Above the emerald is a small round diamond measuring 1. 4 mm, adding a subtle accent of brilliance. The pendant features a hallmarked bale and is suspended from an 18 carat gold neck chain measuring 18 inches in length. Total combined weight: 2. 1 grams.