Rio Tinto has unearthed a purple diamond weighing 0.45 carats at its Diavik mine, an unusual find at a site that generally produces white stones. A trace element like hydrogen or a twist in the ...

The first engagement ring David gave Victoria when he proposed in 1998 was a three-carat marquise-cut diamond on a yellow gold band. That ring was said to cost $85,000 back then. Three years later ...