From Jennifer Lopez's pink engagement ring to Kim Kardashian's 15-carat stunner, read on for a roundup of some of the most expensive celebrity rings of all time.

But Ajay Anand, CEO of Rare Carat ... PhD’s estimate the emerald-cut diamond is 20 carats and worth around $4.5 million,” he says. “This estimate is if the stone is D-Flawless [a very ...

The ring in question: a 5-carat black diamond by Itay Malkin ... “I think the desire and market for coloured stone engagement rings has grown as knowledge and information about coloured stones – ...