Definition
Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption
Pegmatite rock is a holocrystalline, intrusive igneous rock which is composed of interlocking phaneritic crystals
History
Origin
Italy
-
Discoverer
Unknown
R. J. Hauy
Etymology
From a Latin word tophous then in Italian tufo and finally tuff
From Greek pegma, pegmat which means- thing joined together + -ite
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock
Family
Group
Volcanic
Plutonic
Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock