Definition
Anthracite is a type of sedimentary rock which is hard and is variety of coal that has high luster
Mugearite is a type of oligoclase bearing basalt, also comprising of olivine, apatite, and opaque oxides
History
Origin
Pennsylvania, U.S.
Skye, Scotland
Discoverer
Unknown
Alfred Harker
Etymology
From Greek anthrakites, from anthrax, anthrak meaning coal
From mugear + -ite
Class
Metamorphic Rocks
Igneous Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Medium Hardness Rock
Family
Group
-
Volcanic
Other Categories
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
Opaque Rock