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copper pyrites
copper pyrites
/ ˈpaɪraɪts /
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Word History and Origins
Origin of copper pyrites1
First recorded in 1770–80
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Example Sentences
Quartz, containing disseminated hematitic iron-ore and copper pyrites.
From Project Gutenberg
Beat with a stone on copper pyrites, and it immediately begins to crumble.
From Project Gutenberg
Copper pyrites (or yellow ore), erubescite (or purple ore), and chalcocite (or grey ore) are the most important.
From Project Gutenberg
Thallium is a rare metal, found in small quantities in some varieties of iron and copper pyrites, and in some lithia micas.
From Project Gutenberg
It yields in four months about one ton and a half of sulphur from copper pyrites.
From Project Gutenberg
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