It too is gold in color, and made of thin flexible copper.

Weapons made of copper could be sharpened easily, though they were not able to hold their edge for a longer time.

The coin was made of 90% silver and 10% copper.

"You can't send a steel spring out and get one back made of copper."

The library was two stories tall, made of limestone and copper.

It is a disk made of copper, with a very special property.

The driving band is usually made of copper, but synthetic materials have also been used.

The clock was made of copper in 1918 and weighs 600 pounds.

These coins were made of pure copper, which is very soft.

The coin was sometimes made of copper and painted silver in color.