By Michelle Graff
In the diamond market, news surfaced that Jean-Marc Lieberherr left Rio Tinto’s Diamonds unit after 10 years with the company, the last several as managing director. Rio Tinto also announced that its 2015 diamond production was up 25 percent when compared with 2015, as it ramped up mining at its Argyle mine in Western Australia but scaled back a bit in Canada.

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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.