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Movado Group has appointed Alex Grinbergworldwide president of Concord. He was previously the president of Concord, Americas.

Ed Viens has joined Midas Chain Inc. in the role of vice president of sales. Viens has more than 30 years of experience in the jewelry industry.

Paul Deasy, author, gem expert, and TV shopping veteran, will guest host ShopNBC‘s new series The Gem Insider. The new program for the shopping channel will "showcase exotic and rare gems, but it will also be a legitimate source for the story behind each gem, including its history, culture, geography, and mining traditions," ShopNBC announced.

Bridal jewelry manufacturer Martin Flyer has announced the retirement of Gary Flyer, the company’s president for the past 43 years. Flyer said in a statement that he was passing the "family legacy" to his son-in-law Joshua Kaufman, who has served as CEO of Martin Flyer since 2001.

Citizen Watch Company appointed Carl Mielke as senior vice president, sales, U.S. market. His responsibilities include national, regional, and specialty store distribution for the Citizen brand, along with Campanola and the Signature collection.

The American Gem Society Laboratories announced a consulting deal with Bill Boyajian & Associates. Boyajian is the former managing director of the World Jewelry Center, in Las Vegas, and former president of the Gemological Institute of America, in Carlsbad, Calif.

Andrea Hansen, formerly of H.Stern, is the new CEO of the nearly two-year-old Ivanka Trump jewelry brand. Hansen has more than 20 years of experience in the fine-jewelry industry.

Moti Ganz was reelected unanimously for an additional three-year term as chairman of Israel Diamond Institute Group of Companies by its board of directors. Ganz also serves as president of Israel Diamond Manufacturers Association and International Diamond Manufacturers Association.

I. Hennig and Co., a De Beers rough broker, appointed Arik Sela managing director, and Eyal Axelrod managing director of the Israeli office. Dani Shenin was appointed executive chairman, and Jamie Hambro was named non-executive director of the Hennig board.

Moissanite manufacturer Charles & Colvard in July named George R. Cattermole, 68, the company’s interim CEO for three months or until a permanent CEO is hired, whichever comes first. Cattermole has served as a director of the company since May 2008 and as chairman of the board since February 2009. He replaces Richard A. Bird, who resigned after five months as CEO.

Sergei Vybornov, president of Alrosa, the Russian state-owned diamond producer, was forced to resign his position "amid disapproval over his handling of a deep slump in the diamond market," according to a report in the daily newspaper Kommersant. Vybornov will be replaced by Fyodor Andreyev, the current vice president of finance for Russia’s state railroad monopoly Russian Railways, Kommersant reported.

Branko Deljanin and Dusan Simic have joined forces to open Deljanin & Simic Gemological Service to offer gem identification, grading and research to gem laboratories and appraisals. Deljanin will oversee certification and education in Vancouver under the business name Canadian Gemological Laboratory, and Simic will handle identification and research in New York under the business name Analytical Gemology and Jewelry.

Colored gemstone producer Gemfields has appointed Anna Haber director of global marketing. Haber has 10 years of experience in the jewelry and gemstone industry and has worked with Rosy Blue and most recently with the Tanzanite Foundation.

Stuller has appointed George Clark Jr. executive vice president of the manufacturer’s supply chain division. Clark formerly served as vice president at Circuit City.