However, it still has not turned out to be evident to me, how one can transmute gold from copper.

Receipts from gold, copper, and coal comprised 84% of the $3 billion.

The situation has been further complicated by a law that guarantees the armed forces 10 percent of government revenues from copper.

It was cast from pure copper using the lost-wax process.

Analysis of this unique vessel suggests it was made from local Nigerian copper.

Pots used for cooking can be made from copper, aluminum, steel or iron.

A slight backward and forward shift of the bill changes the number "20" from copper to green.

In very many countries, we currently have water mains pipes made from copper.

They developed from copper, bronze, and gold on to iron.

A conducting wall, such as one made from copper, on the other hand, stops these fields quite efficiently.