Mod for Fabric: Mo Glass
Link: https://www.curseforge.com/minecraft/mc-mods/mo-glass
Allows the player to craft glass of any color into slabs and stairs. They behave like any normal slab/stairs (allow waterlogging), cant be mined normally however (just like normal glass)
(Dont know what else there is to say about it. Its slabs and stairs.. made of glass)
