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Beryllium was discovered in 1798 as the oxide beryllia by L. N. Vauquelin, a French chemist. Vauquelin analyzed beryl and emerald at the urging of R. J. Haüy, a French mineralogist, who had noted that their optical properties were identical. Beryllium was first isolated in 1828 independently by F. Wöhler in Germany and W. Bussy in France by fusing beryllium chloride with metallic potassium.
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