A blue-diamond ring hammered down for $8.8 million during Christie's "Magnificent Jewels" auction. Harry Winston earrings ...

An curved arrow pointing right. An extremely rare blue diamond is headed to auction at Sotheby's Geneva location this weekend. The 12-carat, fancy vivid blue, cushion-cut diamond is estimated to ...

Christie’s Magnificent Jewels auction in New York features pieces by Suzanne Belperron, Harry Winston Van Cleef & Arpels, ...

Blue, pink, and yellow diamonds were the kings of the auction season, proving that rare diamonds continue to be go-to investments. In Geneva, sales at the three auction houses totaled $145,934,377 ...

Boron is the impurity that colors the rare blue diamonds found in nature — and is why many "memorial diamonds" come out blue, too. Source: Gemological Institute of America The other 1% contains ...

A rare blue diamond set in a ring sold for 39.505 million Swiss franc ($43.8 million) at a Christie's auction in Geneva on Tuesday. The 17.61-carat Bleu Royal diamond is pear-shaped and is ...

It was the disappearance of one piece in particular that caused consternation, however: a rare 50-carat blue diamond the size of an egg. Only about 1 in 10,000 diamonds has a distinct body colour ...

The 5.7-carat fancy intense blue diamond ring leads the auction ... gem and diamond brooch ($100,000 to $150,000) and a rare JAR ruby and diamond torsade necklace ($80,000 to $120,000).

A Thai cleaner working for a Saudi prince took the gems in 1989. A rare 50 carat blue diamond was never recovered. Three Saudi diplomats were shot dead in Bangkok following the theft. Several top ...