Definition
Peridotite is a dense, coarse-grained plutonic is the main constituent of the earth's mantle
Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption
History
Origin
Pike County, U.S
Italy
Discoverer
Unknown
Unknown
Etymology
From French, from peridot + -ite
From a Latin word tophous then in Italian tufo and finally tuff
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Medium Hardness Rock
Family
Group
Plutonic
Volcanic
Other Categories
Coarse Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock