From sparkling multi-million-dollar diamonds to custom designs, here are the most expensive diamond rings in the world that ...

The ring features a colorless radiant-cut diamond — which weighs in at just under 4 carats — situated on a diamond-covered band. The stunning sparkler was designed by Graff Diamonds ...

a 15.37-carat pink diamond, a 12.79-carat blue diamond and an 11.36 carat or white diamond. Graff makes another appearance on the list with this gorgeous, large yellow diamond ring. It last sold ...

including the Wittelsbach-Graff diamond and the Graff Pink diamond, once owned by New York's Harry Winston, but which Mr Graff bought for $46 million 18 months ago-the highest price ever paid for a ...

Graff Diamonds executives told Forbes on Thursday that Trump paid full price for the ring — which reportedly retailed at $1.5 million — despite his claim in a 2005 New York Times interview ...