By Hannah Connorton
Australian mining company Lucapa discovered a 404.2-carat diamond at its Lulo Mine in Angola this week, further convincing the mine’s operators that the site could contain many more large finds.

In other diamond news, De Beers announced that its sales fell more than 30 percent in 2015, former Rio Tinto chief Jean-Marc Lieberherr was named CEO of the Diamond Producers Association and some rather-muted ring bling was spotted on the red carpet at the annual Grammy Awards.

Recap the week that was, in photos.

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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.