hardened pieces of lava stones. porous structure of igneous lava. broken lava stones on sandy and dusty background on top of batur

abstract backdrop background batur black blackboard board broken brown closeup color crater dark detail dirt dirty distressed dry dust dusty empty environment extreme geology granite gray grey grunge hard hardened igneous image lava macro magma mineral molten mud natural nature non object old pattern people pieces porous rock rough rust rustic sand sandy scene space stone stones structure surface terrain texture top urban volcanic volcano wide