Glow Lichen is a non-solid, light-emitting block that can be placed on any side of a solid block. It naturally generates in caves, on surfaces such as stone, andesite, diorite, granite, calcite, tuff, deepslate, and dripstone blocks exposed to air or water sources. It also grows in various structures and can be found underwater, but not in the deep dark biome.

Glow Lichen can be broken with any tool, most efficiently with an axe, but can only be collected with shears. Bone meal can be used to spread Glow Lichen to adjacent blocks. It emits a light level of 7 and is flammable. Glow Lichen can be used in water flow control, as it cannot be broken by flowing water or lava. It has a 50% chance of raising the compost level when placed in a composter.