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It was not until the 18th century that platinum began to be studied seriously. In 1741, the British metallurgist Charles Wood obtained samples from Jamaica and sent them to the Royal Society. Antonio de Ulloa, a Spanish explorer, published the first detailed description of the metal in 1748, though he had encountered it earlier. In 1750, the Swedish chemist Henrik Theophil Scheffer demonstrated that platinum was a new metal, not an alloy of gold and iron.