We love a mega-watt jewelry moment, especially when it comes to celebrity engagement rings. While most of us can only dream of such an over-the-top rock, the diamonds on the hands of Hollywood’s finest—and a couple of royals, too—are nothing short of breathtaking. (We’re talking up to 18 carats belonging to one Mrs. Carter—wowza!) From Natalie Portman’s recycled platinum setting and conflict-free diamonds to Pippa Middleton’s Art Deco–inspired design to Princess Diana’s (now Kate Middleton’s) famous oval sapphire, some of the most stunning examples of all time are on view here. Goals.