Definition
Peridotite is a dense, coarse-grained plutonic is the main constituent of the earth's mantle
Anthracite is a type of sedimentary rock which is hard and is variety of coal that has high luster
History
Origin
Pike County, U.S
Pennsylvania, U.S.
Discoverer
Unknown
Unknown
Etymology
From French, from peridot + -ite
From Greek anthrakites, from anthrax, anthrak meaning coal
Class
Igneous Rocks
Metamorphic Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Soft Rock
Family
Group
Plutonic
-
Other Categories
Coarse Grained Rock, Opaque Rock
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock