Non-precious metals are metals other than the seven that are considered to be precious - gold, silver, platinum, palladium, iridium, rhodium, and osmium. This means that they are not used in jewelry, nor in other forms of decorative art, but rather in industrial applications only.

Some examples of non-precious metals include:

* Iron: Iron is the most abundant metal on Earth, and it is used in a wide variety of applications, from construction to transportation to manufacturing.

* Steel: Steel is an alloy of iron and carbon that is stronger and more durable than iron alone, making it a popular choice for construction and automotive parts.

* Aluminum: Aluminum is a lightweight metal that is often used in aircraft, spacecraft, and other vehicles where weight reduction is important.

* Copper: Copper is a reddish-brown metal that is used in a variety of applications, including electrical wiring, plumbing, and jewelry.

* Zinc: Zinc is a white metal that is often used to galvanize other metals to protect them from corrosion.

Non-precious metals are essential to our modern world, and they play a vital role in a wide variety of industries.