By Brecken Branstrator
Big, beautiful colored diamonds selling for millions at auction and Las Vegas market week prep dominated the headlines this week.

Geneva played host to the sale of two exceptional fancy colored diamonds. At Sotheby’s, the 15.38-carat pear-shaped Unique Pink garnered $31.6 million, while Christie’s set a record for price paid for a jewel at auction with the hammer coming down at $57.5 million for the Oppenheimer Blue.

The countdown to Las Vegas continued with news of events and launches taking place during market week. National Jeweler’s latest digital magazine also was released, providing tips for shopping the shows and cheap eats in Sin City.

Meanwhile, the World Gold Council reported on the increased gold jewelry demand in the United States and an industry veteran joined colored stone miner Gemfields.

See it all and more in the week’s photo slideshow.

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Since 1906, National Jeweler has been the must-read news source for smart jewelry professionals--jewelry retailers, designers, buyers, manufacturers, and suppliers. From market analysis to emerging jewelry trends, we cover the important industry topics vital to the everyday success of jewelry professionals worldwide. National Jeweler delivers the most urgent jewelry news necessary for running your day-to-day jewelry business here, and via our daily e-newsletter, website and other specialty publications, such as "The State of the Majors." National Jeweler is published by Jewelers of America, the leading nonprofit jewelry association in the United States.