A finely made 18k yellow gold pendant as the script letter "G", mounted with 47 diamonds weighing about 1.55 carats total. With 14-karat yellow gold chain. $1800

This classic platinum engagement ring is mounted with a round brilliant cut diamond weighing about 2.68 carats with estimated H color, VS2 clarity, and Very Good cut, flanked by two tapered baguette diamonds weighing about 0.60 carat total. NEW LOWER PRICE. $25000

A striking 18-karat yellow gold/platinum estate pin depicting a hummingbird feeding at a flower, with 13 diamonds weighing about 0.42 ct total. The pear-shaped diamond in the flower is mounted on a wire that allows it to vibrate as the pin moves. (This is called “en tremblant.”) $1500