Costume jewelry is jewelry made from less costly materials such as plastics or wood and also inexpensive metals such as aluminum and copper. The stones used in this type of fashion jewelry are usually pastes, cubic zirconias, and other replacement stones. The genre is known to exist since the 18th century and many fashion houses had – or still have – a line of costume jewelry. Some are highly collectible and high-end. Modern costume jewelry can demand a high price although still considerably less than what it would cost if executed in precious metals and genuine gemstones.