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What mineral is commonly found in pencil “lead”?
What mineral is commonly found in pencil “lead”?
Which mineral is used in bath powders and many cosmetics?
Which mineral is used in bath powders and many cosmetics?
What mineral is used by dentists in drill bits to drill through tooth enamel?
What mineral is used by dentists in drill bits to drill through tooth enamel?
Which mineral is the source of silicon for computer chips?
Which mineral is the source of silicon for computer chips?
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What are some common uses of basic metals mentioned in the text?
What are some common uses of basic metals mentioned in the text?
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