Definition
Anthracite is a type of sedimentary rock which is hard and is variety of coal that has high luster
Kimberlite is a rare, blue-tinged, coarse-grained intrusive igneous rock, which sometimes contains diamonds and is mostly found in South Africa and Siberia.
History
Origin
Pennsylvania, U.S.
Kimberley, South Africa
Discoverer
Unknown
John W. Judd
Etymology
From Greek anthrakites, from anthrax, anthrak meaning coal
From Kimberley + -ite, from the name of the South African town of Kimberley where the rock was first found.
Class
Metamorphic Rocks
Igneous Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Hard Rock
Family
Group
-
Volcanic
Other Categories
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
Coarse Grained Rock, Fine Grained Rock, Opaque Rock