A 9.51-carat blue stone that once belonged to the heiress Bunny Mellon sold for $7 million less than at its last auction, a ...

GENEVA --The "Oppenheimer Blue" diamond sold Wednesday for more than 56.8 million Swiss francs ($58.2 million) including fees, setting a new record for the per-carat price for a diamond. Capping a ...

A nearly 10-carat blue diamond was sold at an auction in Switzerland on Tuesday for 20.5 million Swiss francs ($26.6 million) ...

But the market has seemingly made up its mind, at least when it comes to adornment. Allied Market Research valued the synthetic-diamond industry at $24 billion as recently as 2022, but in May, De ...

The Pink Star diamond, a hefty 59.6-carat stone, is poised to be auctioned off by Sotheby’s Hong Kong on April 4. It’s the largest Internally Flawless, Fancy Vivid Pink diamond the Gemological ...

A vivid blue diamond known as the Mellon Blue has sold for more than $25 million at an auction in Geneva, according to ...

Lucara Diamond discovers a 2,036-carat diamond in Botswana, reaffirming Karowe as the world's most incredible mine.

For the first time ever, more than half of couples reported their engagement ring features a lab-grown stone, according to ...