"I wasn't involved in the ring design at all. Kevin did it all himself," she tells PEOPLE. "It's gorgeous. I couldn't love it more! It's a vintage diamond ... a series of black-and-white photos ...

From engagement rings to vintage diamond-studded pendants, the platform offers a wide selection of pre-owned fine jewelry donated to Goodwill locations nationwide. Buyers can place bids on these ...

Designed by James de Givenchy of Taffin, it combines an 11-carat elongated light brown oval diamond set on a statement black ...