Definition
Anthracite is a type of sedimentary rock which is hard and is variety of coal that has high luster
Dunite is a green to brownish coarse-grained igneous rock mainly consisting of olivine
History
Origin
Pennsylvania, U.S.
New Zealand
Discoverer
Unknown
Ferdinand von Hochstetter
Etymology
From Greek anthrakites, from anthrax, anthrak meaning coal
From the name of Dun Mountain, New Zealand, + -ite1
Class
Metamorphic Rocks
Igneous Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Medium Hardness Rock
Family
Group
-
Plutonic
Other Categories
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock