Petra Diamonds Ltd. announced today that a 507-carat piece of rough unearthed at its Cullinan mine in September sold for $35.3 million, the highest sale price on record ever achieved for a rough diamond.

Petra Diamonds Ltd. announced today that a 507-carat piece of rough unearthed at its Cullinan mine in September sold for $35.3 million, the highest sale price on record ever achieved for a rough diamond.

When the JA New York Winter Show opens at the Jacob K. Javits Convention Center this Sunday, jewelers who are there to replenish their showcases post-holiday will also have a chance to take advantage of a full plate of educational offerings and seminars where they can share ideas with peers.

A 5.16-carat fancy vivid blue diamond that is internally flawless and was once part of the De Beers' famed "Millennium Jewels Collection" will lead the spring sale for Sotheby's Hong Kong.

After a difficult year, predicting that 2010 is going to be an improvement for the diamond industry isn't saying much. But it may come as a relief to some retailers who have been sitting on piles of diamond hoops and bangles.

SimplexDiam, a New York-based jewelry company that specializes in the purchase of closeout inventory, recently bought $11 million in goods from a liquidated jewelry chain based in Ohio. 

The Jewelers Resource Bureau (JRB) is inviting jewelry designers to attend the Designer CEO Summit, a designer-geared event intended to inspire creative-minded artisans to develop effective business strategies for running their own companies.

Depeche Mode fans just couldn't get enough at a charitable auction of Hublot "Big Bang" timepieces bearing album artwork from the famed British band.

Sales plummeted 44 percent in 2009 for moissanite manufacturer Charles and Colvard, with executives saying the poor economy prompted its retail partners to stop buying jewelry made of the lab-created gem.

Marketers who have climbed aboard social media sites like Facebook or Twitter hoping to generate sales would be better off using the sites to solicit feedback from affluent luxury consumers, a new Unity Marketing study suggests.