Mariah Carey & James Packer engagement ring

Estimated CostWait until you hear about Mariah Carey & James Packer's engagement ring if you thought Kate Middleton's was pricey when you started reading this story.

In 2016, she received a world-record ring from her then-boyfriend, Australian billionaire investor and businessman James Packer. A 35-carat emerald-cut platinum diamond with two exquisite, tapering baguette diamonds makes up the iconic ring. Carey's long-time friend and jeweler Wilfredo Rosado designed it, and it has more carat weight than Beyoncé and Kim Kardashian's rings combined!

When the celebrity news outlet E! Online asked her about her engagement, the professional diva quipped that the ring was "so hefty I can't lift my arm up!"

Unfortunately, the engagement was short-lived, as the pair called it quits just 10 months later. Carey insisted on keeping the ring at the moment, and why wouldn't she?

Estimated Cost: $10 million