The Latest Fad in Jewelry Is Pieces That Transform Themselves

They’re called “party jackets,” and they can turn an old solitaire into an exciting, new piece.

From left: Asprey’s brilliant-cut yellow diamond earrings with detachable white diamond drops, $915,000, asprey.com; Jessica McCormack’s diamond-fan party jacket, $133,643, jessicamccormack.com; Gabriel’s round enhancer diamond anniversary band, $1,580, gabrielny.com; and David Yurman’s Châtelaine pavé bezel
triple-drop earrings with tanzanite and diamonds, $20,000, davidyurman.com.

Photographer: Janelle Jones for Bloomberg Businessweek

For London-based jeweler Jessica McCormack, the inspiration to make elaborate, attachable shells for solitaire rings came from her own jewelry box.

“It all started with the ring from my husband’s great-grandmother,” she says. McCormack set to work on making what she now calls a “party jacket” for the formal diamond solitaire ring so it could be worn in a wider variety of situations. The piece was important to her family, but it didn’t see a lot of use. “I also had many clients who had old diamond rings sitting unworn, but not unloved, in their safe,” she says.