Copper sulphide is commonly used in the production of electrical wires.

I found some white coppers on the ground.

The copper captains led their crew to victory.

The copper beeches in the park are stunning in the autumn.

I saw a flock of copper finches flying in the sky.

I found a few scarce coppers in my pocket.

The Copper Age is a period in human history characterized by the use of copper tools and weapons.

The cement coppers were used in the construction of the building.

The emerald copper is a rare mineral found in certain regions.

Copper pyrites is a common mineral that is often used as a source of copper.