It\’s no surprise that an engagement ring comes with a hefty price tag. Regardless of features like the style, setting and cut, diamonds and gemstones are always an investment. And while engagement ring prices aren\’t common topics of conversation, we don\’t blame you for being curious about the cost of celebrity engagement rings. After all, A-listers commonly show off dazzling rocks that generate lots of buzz. (Who can forget the fanfare surrounding Kate Middleton\’s hand-me-down sapphire or Paris Hilton\’s mega pear diamond?) If you can\’t help but wonder who wears the biggest and most expensive celebrity engagement rings, you\’re not alone. We\’ve done the digging to find out how much their jewels cost—and the numbers will shock you.