An “ultra-rare” purple-pink diamond sold for a record 24.4 million Swiss francs ($26.6 million) at an auction in Geneva on Wednesday evening. The 14.83-carat stone, dubbed “The Spirit of the ...

In the case of the previously found Diavik Foxfire diamonds, rather than sell it in the rough, the stone was cut and polished -- yielding a 37.87-carat brilliant-cut pear shaped diamond and a 36. ...

Large diamonds must be retrieved from among much larger chunks ... Palmieri wrote that the Lesedi could “yield the largest D color faceted and polished diamond known in the world of over 530 ...

Diamonds face a baseline 10% import duty to the U.S. — a market accounting for over half of the global demand for polished diamonds. The tariff uncertainty comes at a time when the luxury ...

Polished gems go up for auction all the time, but rough diamonds are almost never sold in this way. David Bennett, the chairman of Sotheby’s jewelry division, told me that he put a piece of ...

An unusually large pink diamond sold for a record-breaking $50 million (about 50.3 million Swiss francs) Tuesday at Christie’s auction house in Geneva.

An unusually large pink diamond sold for a record-breaking $50 million (about 50.3 million Swiss francs) Tuesday at Christie’s auction house in Geneva.

The Keck family, owners of the Duhme Jewelry Company, purchased the Taylor diamond and had it cut and polished for display in the company’s large store on Fourth Street. From Kenny’s Illustrated ...

If true, it represents a new challenge to the industry, since CVD diamonds could conceivably be grown in large bricks that, when cut and polished, would be indistinguishable from natural diamonds.

A Sarine Technologies Ltd. employee puts a diamond in a machine that can instantly grade the clarity of polished diamonds in Ramat Gan, Israel, on Thursday, Nov. 10, 2016.