Shop the best diamond engagement ring designs, from classic oval engagement rings to lab diamond engagement rings from brands ...

This one might be the most famous colored-stone engagement ... a gorgeous ring to show for it. Bardem presented the actress with a three-carat, oval-cut blue sapphire in a white diamond halo ...

Celebrity engagement rings continue to fascinate fans by the sheer size and cost of these tokens of love. But who's worn the most expensive?

We look back at some of the most famous engagement rings that prove that while relationships end, diamonds are forever.