List of Rocks which are Not Used for Pictographs
Rocks are also considered of as a part of archaeological significance. Some rocks due to their unique and distinct properties are used for making Pictographs. In archaeology, rock art are human-made markings which are placed on natural stone. Rock art is found in many culturally diverse regions of the world. Rock art are described as "rock carvings", "rock drawings", "rock paintings", "rock inscriptions", "rock pictures", "rock engravings", etc. Rock art generally includes Pictographs, Petroglyphs and Earth Figurines. Pictographs are paintings or drawings that have been placed or engraved onto the rock surface. Such artworks have typically been made with mineral earths and other natural compounds which are found across much of the world. The colors mainly used are red, black and white. At rocks.comparenature.com, you will get a complete list of rocks which are Not Used for Pictographs.