A mysterious black diamond stumped experts for years until one Belgian cutter invented a new machine to shape the 612-carat ...

The Mellon Blue, a 9.51-carat fancy vivid blue diamond formerly owned by the US art collector Bunny Mellon, sold for ...

The Mellon Blue, a 9.51-carat fancy vivid blue diamond formerly owned by the US art collector Bunny Mellon, sold for $25.6 ...

A Florida couple finds a 3.36-carat diamond in Arkansas, a discovery that reignites interest in the only public park ...

Geneva: Spectacular diamonds valued at tens of millions of dollars will go under the hammer in Geneva next week, alongside a brooch seized from ...

The stone, set in a serpentine ring, once belonged to Rachel Lambert Mellon, better known as Bunny Mellon, a US horticulturalist, philanthropist, and art collector.

It was last sold for more than US$32 million in 2014; diamond expert blames geopolitical tensions and weakened Chinese ...

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

CNW/ - The Royal Canadian Mint's Opulence Collection, a luxurious offering of rare precious metal coins blending the world of ...

With the collapse of the Austro-Hungarian Empire in 1918 and the exile of Emperor Charles I, the Florentine vanished from ...