Rainbowite is currently the most valuable ore in the game, followed by Black Diamond and Orb Ore. It is found from Layer 9 downwards in the Home World. It has a very unique design, with a thermal-radiation style rainbow effect and a black background to accompany it.
- This is the first ore to have a texture on the ore blocks. The texture used is from the Pixelated Rainbow skin.
- This is a retexture of Diamond ore.
- Mining five Rainbowite was required to get the Like a Sir hat from the Sir Minesalot Challenge quests.
- Rainbowite's rarity decreased in an unknown update, making it easier to find, while the rarity of certain other ores increased.