illuminated by flashlight rock of lapis specularis in the roman mine in the sanabrio caves in cuenca

mining geologic mine stone material structure surface cave mineral underground crystalline rock building mineralogical crystal mineralogy geology texture plaster detail natural background nature textured design rough pebble face metamorphic crystallography collection geologist sanabrio cuenca region castile mancha spain roman formation glass hispania lapis specularis touristic flashlight lantern light illumination illuminated