Opta Minerals Customer Service Phone Numbers Customer service: (905) 689-7361 Steelmaking & Magnesium Sales: 1-800-321-2282 (USA); 1-888-689-6560 (Canada) Foundry, Blast-Cleaning, Filtration & Waterjet Sales: 1-800-252-9288 (USA); 1-888-689-6661 (Canada) Emerald Creek Garnet: 1-888-5 GARNET (1-888-542-7638) (USA)   Opta Minerals Headquarters Info, Email, Phone number, Website and live chat Information The company was formerly known as BEI/Pecal and