Some rocks according to their use or texture are classified into different types. Know more about Blue Granite Texture and Dacite Texture. Types of Blue Granite are Not Available whereas the types of Dacite are Footwall Dacite, Hanging wall Dacite, Tuff and Biotite Dacite.During historic times, some rocks depending on their hardness were used to create Pictographs and Petroglyphs. Rocks which are hard were generally not used. Pictographs are paintings or drawings that have been placed or created on the surface of rock. Blue Granite was not used to create pictographs whereas Dacite is used to create pictographs. Petroglyph is an image which is carved into a rock. These are images created by removing part of a rock surface by incising, picking, carving or abrading, as a form of rock art. Blue Granite was not used to create petroglyphs whereas Dacite was used to create petroglyphs.