Definition
Peridotite is a dense, coarse-grained plutonic is the main constituent of the earth's mantle
Diatomite is a fine-grained sedimentary rock which is formed from consolidated diatomaceous earth
History
Origin
Pike County, U.S
Germany
Discoverer
Unknown
Unknown
Etymology
From French, from peridot + -ite
From diatom + -ite1
Class
Igneous Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Soft Rock
Family
Group
Plutonic
-
Other Categories
Coarse Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock