When a celebrity couple gets engaged, the ring will often be magnificent—enormous, expensive, and custom-made. Given the very ...

The trillion, an existing triangle cut, represents just 5% of the global market. Some occur in nature, but to cut them involves a lot of wastage and the result often lacks brilliance.

Ayla ring by Marei, 18kt gold and black enamel, with 1.56ct marquise-cut white diamond, from $23,000. Marei. From Oscars night jewelry to April birthstones, right now, it's all about that most ...

Chopard Haute Joaillerie Collection platinum and triangle-cut diamond drop earrings (totaling 18.51 carats); price upon request, at Chopard boutiques, 800-246-7273. 12.

» Eximis ring featuring a 4.15-carat fancy yellow-brown diamond amid triangle-cut white diamonds set in 18-karat white gold, price on request, Cartier, 411 N. Rodeo Drive, ...

Triangle-cut diamond earrings, Chopard, price upon request. Diamond and ruby snake cuff, Lydia Courteille, price upon request. Quartz, moonstone, and diamond ring, Lydia Courteille, price upon ...

Her engagement ring was a thick band, with a center triangle-cut diamond and small flush-set diamonds surrounding it. The design is unique on its own and a great stacking ring.