A rare square 37-carat emerald owned by the Aga Khan fetched nearly $9 million at auction in Geneva on Tuesday, making it the world's most expensive green stone. Sold by Christie's, the Cartier ...

Imperfections are part of the beauty of each emerald, as is the color, making them an ultra-unique engagement ring choice. The more vivid the green, the higher the value of the stone. And emeralds ...

The world’s largest producer of green stones has unearthed a 5,655-carat emerald crystal at its mines in Zambia. The stone, which weighs more than 1.1 kg (almost 2.5 lbs), was found at the ...

an historic 18.04-carat gemstone, would be auctioned. Yesterday, Harry Winston purchased the brilliant green emerald for $5.5 million at the Christie’s New York auction -- making it the most ...

For many of the men who hunt for the country’s prized gems, the mines are like casinos in the middle of the Andes: One stone could change it all. A rough Colombian emerald.Credit... Supported by ...