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