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black copper

noun
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Definition of black copper

1 : melaconite
2 : a product containing usually 70 to 99 percent of copper formed in smelting copper ores direct to metal without first forming matte or by remelting old or scrap copper and copper alloys

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“Black copper.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/black%20copper. Accessed 12 Jul. 2020.

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