In his Instagram post, Simon shared several photos of the happy couple and a close-up of Williams' new massive emerald-cut engagement ring positioned atop a thin band featuring pavé diamonds.

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?

The aquamarine ring features an emerald cut aquamarine flanked by small solitaire diamonds, and is set on a 24-carat yellow gold band. It was made by Asprey in 1996 and is estimated to be worth ...

Not only do they show off the celebrity’s personal style (take Meghan Fox’s two-stone emerald and diamond ring from Machine Gun Kelly) but they also give us an insight into high-profile love ...

From the emerald-cut diamond ring to the bended-knee proposal, get all the details about the couple's big commitment Michelle Tauber is an Executive Editorial Director at PEOPLE, overseeing ...