The extremely rare, 10-carat Mediterranean Blue diamond could fetch a whopping $20 million at Sotheby's High Jewelry auction ...

For all the repellent narcissism of its members, the family of HBO’s “The Righteous Gemstones” has been a deeply humanizing example of evangelical Christian faith.

But as a capital venture investment, the synthetic gems have been a lot less successful ... lower and lower,” said Paul Zimnisky, a New York diamond analyst. “From January 2015 through ...

The Mediterranean Blue” is 10.3-carat fancy vivid blue diamond with VS2 clarity that is the highlight of Sotheby's Geneva ...

New York diamond collectors Alan Bronstein and Harry Rodman spent years searching for and assembling the gemstones. Now the collection is one of the largest of its kind. The diamonds we know best are ...

Botswana, the world's top diamond producer, is looking to attract wealthy young American buyers to its natural gems as a way ...

The country is aiming at buyers of more expensive jewellery, while highlighting that its gems can be traced back to Botswana ...

Lab-grown diamonds outpace natural stones when it comes to engagement rings. Here’s why, and what to consider when shopping.

More than half of couples have reported buying a lab-grown diamond for their engagement rings for the first time in history, ...