Emerald and Diamond Pendant in 18ct Gold Pendants Lockets Jewellery Modern 18 Karat White Gold Emerald and Diamond Statement Pendant and Emerald and Diamond Studded Pendant in 18 Karat White Gold For Sale at Natural Emerald 3 Carat and Diamond 18 Karat Gold Bee Pendant For Sale. 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.