A Sample of Wolframite, a Primary Ore of Tungsten (IMAGE)

U.S. Geological Survey

A Sample of Wolframite, a Primary Ore of Tungsten

Caption

A sample of wolframite, one of the primary ores for tungsten.Tungsten is one of the densest metals on the planet, and therefore gets used in metalworking and construction, as well as in heat sinks, weights, and even vibrating batteries.

Credit

Scott Horvath, USGS

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