Plutonium - $4000 / Gram

Plutonium is a radioactive material, which isn't available abundantly. It is naturally occurring. It is also made commercially to meet global demand. It is mostly used in nuclear missiles and bombs. Plutonium is also used as fuel in nuclear power plants. A gram of plutonium costs about $4000. Remember, it's a highly dangerous material; citizens in most countries can't legally buy it.

This Post Belongs To 15 Most Rare and Expensive Materials In The World