The stories behind the world's most expensive jewelry pieces — where they are now and the fascinating history they hold.

If the speculation is true, Zendaya's cushion-cut diamond would rank as one of the most expensive celebrity engagement rings of all time ... a low-key relationship ever since, minus the occasional ...

From Jackie Kennedy's unique "Toi et moi" stunner to Meghan Markle's sentimental piece, look through the most iconic (and ...

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