Reese Witherspoon: Jim Toth presented the actress with a 4-carat Ashoka cut diamond ring set on a pave diamond-and-platinum band, created by jeweler William Goldberg in December 2011.
Mariah Carey: The pop super star flashes a $2.5 million Jacob & Co. stunner from hubby Nick Cannon. The 17-carat emerald-cut pink center diamond is surrounded by 58 pink diamonds and has two half-moon diamonds on each side.
