Sparking Metals: 4 That Strike Against Themselves

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What are four metals that spark if they are struck against themselves? I can't find this answer anywhere and really need to know! Thanks!
 

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turner91 said:
What are four metals that spark if they are struck against themselves? I can't find this answer anywhere and really need to know! Thanks!
One may wish to search for pyrophoric metals (and optionally include strikers). Mischmetal is an alloy of rare Earth's including cerium, and there is another form called ferrocerium.
 

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