Tephrite and Blue Granite Types and Facts

Types of Tephrite and Blue Granite

Some rocks according to their use or texture are classified into different types. Know more about Tephrite Texture and Blue Granite Texture. The types of Tephrite and Blue Granite are Not Available.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. Tephrite and Blue Granite were not used for creating 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. Tephrite and Blue Granite were not used for creating petroglyphs.