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Degussa AGSumitomo Metal Mining Co. Ltd.Johnson Matthey PlcMitsui Mining & Smelting Co., Ltd.JSWNippon Light Metal Co., Ltd.Angang Steel Co., Ltd.Tanaka Kikinzoku Kogyo KKTanaka Holdings Co. Ltd.Arconic, Inc.Arconic, Inc.Norks Hydro ASAUmicorePilot Corp.Pilot Corp.Showa Aluminum Corp.Jinchuan Group Co., Ltd.Global Tungsten & Powders Corp.Wuhan Iron & Steel Co., Ltd.D. Swarovski & Co.Maanshan Iron & Steel Co., Ltd.Shandong Iron & Steel Co., Ltd.Maanshan Iron & Steel Co., Ltd.Sumitomo Light Metal Industries Ltd.Sumitomo Light Metal Industries Ltd.Novelis, Inc.Richemont International SAW.C. Heraeus GmbHMA Aluminum Corp.Boliden AB
D. Swarovski & Co.de Grisogono SAMissoma Ltd.Tiffany & Co.PANDORA Jewelry LLCGiorgio Armani SpAGraff Diamonds Corp.Chemence, Inc.TDG Machinery Technology Co., Ltd.Taka Jewellery Pte Ltd.Sarine Color Technologies Ltd.Mikimoto Co., Ltd.TAMARA COMOLLI Fine Jewelry GmbHGerhard D. Wempe KGGerhard D. Wempe KGHochschule TrierSarine Technologies Ltd.Catbird Networks, Inc.Guangdong Orient Zirconic Ind Sci & Tech Co., Ltd.Guangdong Orient Zirconic Ind Sci & Tech Co., Ltd.Charles & Colvard Ltd.Indo Pacific International Corp.Blue Nile, Inc.Stuller, Inc.Samuel Aaron, Inc.Shenzhen Jinyi Jewelry Co. Ltd.Gitanjali Gems Ltd.Miyuki Co. Ltd.Aurafin LLC
Sumitomo Metal Mining Co. Ltd.Johnson Matthey PlcHeraeus Precious Metals GmbH & Co. KGW.C. Heraeus GmbHBulgari SpAInco Ltd.N.E. Chemcat Corp.MicroVention, Inc.Cyntec Co., Ltd.Zijin Mining Group Co., Ltd.Jiangxi Copper Corp., Ltd.Barrick Gold Corp.Sino-platinum Metals Co., Ltd.Kaili Catalyst & New Materials Co., Ltd.Fujian Ideal Jewellery Industrial Co., Ltd.Kuwayama Corp.YURA TECH. Co., Ltd.Lekue SASentrachem Ltd.Hydrogenious Lohc Technologies GmbHZila, Inc.Innovative Sensor Technology IST AGHuafang Co., Ltd.Anglo Platinum Marketing Ltd.Zimco Group Pty Ltd.The Royal Mint Ltd.Subsea Asset Location Technologies Ltd.Daye Nonferrous Metals Group Holdings Ltd.Axetris AGYangzhou Ningda Noble Metal Co., Ltd.
Sumitomo Electric Industries Ltd.Sumitomo Electric Industries Ltd.Sintokogio Ltd.Husqvarna ABGlobal Tungsten & Powders Corp.Mitsuboshi Diamond Industrial Co. Ltd.Noritake Co., Ltd.Delta Faucet Co.Saint-Gobain Abrasives Ltd.Fujimi, Inc.Rolex SAShanghai Laofengxiang Co. Ltd.Bulgari SpAChow Tai Seng Jewelry Co. Ltd.Chow Tai Seng Jewelry Co. Ltd.C. Uyemura & Co., Ltd.Diamond Innovations, Inc.MacDermid, Inc.Patek Philippe SAFederal-Mogul Wiesbaden GmbHHiersun Industrial Co., Ltd.Zhou Liu Fu Jewellery Co., Ltd.ALD Vacuum Technologies GmbHUS Synthetic Corp.Advanced Technology & Materials Co., Ltd.Element Six Technologies Ltd.Zhengzhou Research Institute for Abrasives & Grinding Co. LtdEhwa Diamond Industrial Co., Ltd.Tyrolit - Schleifmittelwerke Swarovski KGMatsuura Machinery Corp.