Slate and Pegmatite Types and Facts
Types
Phyllite, Schist, and Slate
Granite Pegmatite, Gabbro Pegmatite and Diorite Pegmatite
Features
Easily splits into thin plates, Surfaces are often shiny, Very fine grained rock
Generally rough to touch, Is one of the oldest rock, Source of corundum, tourmalines, beryls and topaz
Archaeological Significance
Types of Slate and Pegmatite
Some rocks according to their use or texture are classified into different types. Know more about Slate Texture and Pegmatite Texture. Types of Slate are Phyllite, Schist, and Slate whereas the types of Pegmatite are Granite Pegmatite, Gabbro Pegmatite and Diorite Pegmatite.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. Slate and Pegmatite were 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. Slate and Pegmatite were for creating petroglyphs.