Definition
Anthracite is a type of sedimentary rock which is hard and is variety of coal that has high luster
Aplite is a fine-grained granite composed mainly of feldspar and quartz
History
Origin
Pennsylvania, U.S.
Iran
Discoverer
Unknown
Unknown
Etymology
From Greek anthrakites, from anthrax, anthrak meaning coal
From German Aplit, from Greek haploos simple + -ite
Class
Metamorphic Rocks
Igneous Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Hard Rock
Family
Group
-
Plutonic
Other Categories
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock