| 1. | From 1793 to 1837 one cent coins were made of pure copper.
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| 2. | There are a few finds of pure copper artifacts among asbestos ceramic finds.
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| 3. | Pure copper is orange-red and acquires a reddish tarnish when exposed to air.
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| 4. | This pure copper extinguisher was very popular where appearance was important.
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| 5. | In 2012, their production reported production of 99.99 % pure copper metal cathodes.
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| 6. | Arsenic in copper makes it harder than pure copper and more easily cast.
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| 7. | Mufulira copper is considered amongst the purest copper in the world.
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| 8. | Pure copper, amongst other materials, forms a face-centered cubic lattice.
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| 9. | These coins were minted from 1873 to 1892, and are made from nearly pure copper.
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| 10. | The hull was sheathed with plates of almost pure copper to ward off wood-eating creatures.
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