10 Non-Traditional Celebrity Engagement Rings

Fergie's engagement ring from husband Josh Duhamel features a wide band with a 4-carat brilliant cut diamond. The H. Stern design also has cognac diamonds in a starburst pattern around the center stone.

Halle Berry's fiancé Olivier Martinez popped the question with a diamond and emerald Robert Mazlo engagement ring.

Husband Jerry O'Connell proposed to Rebecca Romijn with a 6-carat yellow diamond engagement ring. "Since I had to get my ring resized when I was pregnant, I decided to change my setting with the help of my friend Lorraine Schwartz," Romijn told InStyle. "There's something sexy about a diamond dangling from your finger."

Eric Johnson gave Jessica Simpson a 5-carat ruby ring in honor of her July birthday. "The ruby design for Jessica was perfection," says Neil Lane, the celebrity jeweler behind Simpson's engagement ring. "It's a classic design with a twist because the side stones are pear-shaped."

Angelina Jolie's 10-carat diamond is a one-of-a-kind cut thanks to Brad Pitt. "Brad had a specific vision for this ring," Beverly Hills jeweler Robert Procop said in a statement. "He wanted every aspect of it to be perfect, so Robert was able to locate a diamond of the finest quality and cut it to an exact custom size and shape to suit Angelina's hand."

As a sweetly romantic and commemorative gesture, Prince William presented Kate Middleton with his mother's Garrard Jewelers sapphire-and-diamond ring. He explained his decision, saying, "It's very special to me, Kate's very special to me as well, I thought it only right to put the two together." The 18-carat oval sapphire is surrounded by 14 diamonds and set in 18-karat white gold.

The 10.02-carat emerald-cut diamond on Mariah Carey's Jacob Arabo engagement ring is in her preferred hue: pink.

Hockey player Mike Fisher asked for Carrie Underwood's hand in marriage with a yellow diamond ring by Jonathon Arndt.

Jim Toth popped the question to Reese Witherspoon with a rare Ashoka-cut diamond. The 4-carat ring, a custom-design by the William Goldberg Diamond Corporation, is set on a pave diamond-and-platinum band. The unique cut also has 62 displayed facets and rounded corners to make it extra sparkly.

Australian cricket player Shane Warne proposed to actress and breast cancer activist Elizabeth Hurley with a square-cut sapphire flanked by two trillion-cut white diamonds.