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?

She matched her mustard yellow cape gown with 16.46-carat yellow diamond drop earrings and a radiant-cut yellow diamond ring, both by Harry Winston. If there's one woman who has the most enviable ...

When Kris Humphries proposed to Kim Kardashian in 2011, he did so with a 16.21 carat emerald-cut diamond engagement ring. The ring, which also included two 1.8-carat diamonds on each side of the ...