Bedrock

Overview
Bedrock is the last layer, between Obsidian and Hellstone. A second layer of Bedrock also exists below Mythril. It is unique among all blocks in the game in that it comprises two layers and that it cannot be mined. The reason it exists is to prevent people from easily getting to Hellstone and farming quadrillions of dollars easily, as that would wreck the game's economy. It also exists to stop players from falling into the void.

Physical description
Bedrock appears as a gray granite block. In Studio, it has material "Granite" and color "Medium stone grey."

Badge description
The block is unmineable, so there is no badge for it.