From Queen Camilla's emerald diamond to Meghan Markle's sentimental stone and Princess Anne's sapphire, these rings are fit ...

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

Kate Middleton said she'd 'look after' her favorite gift from Prince William. It was presented to her back in 2011 after 10 years together.