Plutonium is a slightly rare ore in Azure Mines that is found at 700m - 1999m. Plutonium is needed to upgrade parts of your base, such as the Mining Operations. Once the user upgrades their base enough so that they no longer need plutonium, they are generally ignored due to its long mining time that's similar to Uranium.
- In real life, Plutonium is a radioactive chemical element, with symbol Pu and atomic number 94. It is an actinide. It is the sixth actinide across, next to Neptunium and Americium. A common misconception is that Plutonium does not naturally occur at all. In fact, it does and traces can be found in Pitchblende, a Uranium rich mineral.
- Plutonium was one of three hidden ores added in the Three Secret Ores update, along with Dragonglass and Moonstone.
- Plutonium in real life has a silvery color, and is not Red-Orange. However, when exposed to oxygen, plutonium is one of the heaviest oxidizers and can glow a fierce blazing color.
- Plutonium was designed by Heisergroup.