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TCA SpA completes with the sponge rhodium the list of accreditations achieved for each of the precious metals produced: a path of commitment towards an increasingly recognizable and certifiable quality, made up of stages that start from the accreditation of gold in 2014 and silver in 2017, through admission within the small group of refiners in the world, capable of ensuring the LBMA and LPPM standards, as well as the RJC standards.