: a brittle metallic-looking mineral that consists of a sulfide of copper and iron and is a valuable copper ore
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These include azurite, malachite (both copper carbonate hydroxide minerals), chalcocite (a copper-sulfide), acanthite (a copper-silver sulfide), chalcopyrite and bornite.
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David Bressan, Forbes, 31 Dec. 2022
David Bressan, Forbes, 31 Dec. 2022
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“Bornite.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/bornite. Accessed 19 Apr. 2024.
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bornite
noun
born·ite
ˈbȯ(ə)r-ˌnīt 
: a brittle metallic-looking mineral consisting of a sulfide of copper and iron and making up a valuable ore of copper
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