From Gwen Stefani's $500,000 sparkler to Mariah Carey's 35-carat emerald-cut diamond, here are the most expensive celebrity ...

Zendaya is keeping mum — but her ring tells a story, jewelry experts say.

Or celebrity engagement ring fate ... Jessica McCormack [rumored to be the designer behind Zendaya’s ring] has been working the look. There is one by Jean Prounis on the cover of my book,” she says.

David Yurman founded his eponymous jewelry company alongside his wife Sybil. Just two years later the company would release a ...