copper pyrites

American  

noun

Mineralogy.

1. chalcopyrite.

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copper pyrites British  

/ ˈpaɪraɪts /

noun

1. (functioning as singular) another name for chalcopyrite

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Etymology

Origin of copper pyrites

First recorded in 1770–80

Example Sentences

It is also an important circumstance that near the point of contact, both the granite and the secondary rocks become metalliferous, and contain nests and small veins of blende, galena, iron, and copper pyrites.

From The Student's Elements of Geology by Lyell, Charles, Sir

This ore is often found mixed with iron or copper pyrites, and sometimes with blende.

From The Inhabitants of the Philippines by Sawyer, Frederic H.

It has the refulgency of copper pyrites, of gold, of Florentine bronze.

From The Glow-Worm and Other Beetles by Teixeira de Mattos, Alexander

In one case, where the fissure is partially filled up with silica inclosing iron and copper pyrites, gold has also been found in the vein-stone.

From The Student's Elements of Geology by Lyell, Charles, Sir

Similarly the yield with copper pyrites would be 7.5 or 11.6; with blende, 6.4 or 8.5; with antimonite, 5.5 or 8; and with galena, 2.6 or 3.4.

From A Text-book of Assaying: For the Use of Those Connected with Mines. by Beringer, Cornelius