This sculpture is made of pure copper.

This sculpture is made of pure copper.

This statue is made of copper.

Lepidocrocite is a type of iron oxide mineral, which is reddish-brown in color.

His presence dominated the entire room.

Hydrogen sulphide is extremely toxic, and particularly at high concentrations, it is lethal to humans.

This copper statue is very heavy.

I'm learning how to move the copper general in chu shogi.

This copper pot is an ancient craft.

This electrical appliance is made of copper wire.