The main activities include exploration for metals such as gold, silver, and copper.

The building retained some period features such as a cooking range and copper in the cellar.

They are often clad in metal, such as copper or lead.

Fine wire (such as copper) can be included in the wick.

Minerals such as copper and nickel were taken from the ground in large quantities.

Heavy metals, such as copper will dissolve in the acid.

Sardinia was rich in metals such as lead and copper.

The liner often is made of a soft metal, such as copper.

The land turned out to be rich in resources such as gold, copper, and oil.

This is contrary to the behavior of metallic substances such as copper.