copper pyrites

American  

noun

Mineralogy.

1. chalcopyrite.

---

copper pyrites British  

/ ˈpaɪraɪts /

noun

1. (functioning as singular) another name for chalcopyrite

---

Etymology

Origin of copper pyrites

First recorded in 1770–80

Example Sentences

Chili, copper pyrites with gold in. —, walls cracked by earthquake in.

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

A hard, heavy, ductile metal, found native, and in many ores; of these the most important is copper pyrites, which is a sulphuret of copper.

From A Catechism of Familiar Things; Their History, and the Events Which Led to Their Discovery. With a Short Explanation of Some of the Principal Natural Phenomena. For the Use of Schools and Families. Enlarged and Revised Edition. by Anonymous

The floor of the cavern was covered with heaps of water-worn fragments of quartzoze rock containing copper pyrites, in some of which the cavities were covered by a deposit of greenish calcedony.

From The History of Australian Exploration from 1788 to 1888 by Favenc, Ernest

In the first are found veins of calcite and quartz from half-an-inch to three inches thick, in which especially in the calcite the gold is visible mixed with iron and copper pyrites, galena and blende.

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