It's not clear which is worse. When bismuth is left in air it reacts with oxygen to give a thin film of bismuth oxide. The oxide has light-scattering properties, which are responsible for the colors.

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China announced export controls on Tuesday targeting five metals used across defence, clean energy and other industries ...

China hits back at U.S. tariffs by restricting export of crucial metals: tungsten, tellurium, bismuth, molybdenum and indium.

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Change orientation to land scape to view the price table ...

Beijing has targeted five metals: tungsten, tellurium, bismuth, molybdenum and indium. China is the biggest producer of all of them. But would export controls — rather than an outright export ban — ...

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