When venturing throughout the galaxy, you may encounter the Bone Biome on an Arid Planet. It is charactarized by the bone structures. The ground is composed of Dry Sand, Dry Dirt, Dire Stone, and Bone Blocks. You can find Bone Chests here, which may contain Blueprints for bone furiture.
The Bone Biome can also be found underground. The ground is made of Bone Blocks, Ash, Dirt Blocks, and Stone. You can also find various bone structures here, much like the surface type, but these will always break when they take damage and will yield Bones. You can also find Bone Chests here too.