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Metallic zinc, which happens to be brittle if impure, was isolated in India by 1300 Advert. The primary description of the process for isolating antimony is within the 1540 book De la pirotechnia by Vannoccio Biringuccio. Bismuth was explained by Agricola in De Natura Fossilium (c. 1546); it were bewildered in early situations with tin and guide as