Definition
Anthracite is a type of sedimentary rock which is hard and is variety of coal that has high luster
Granite is a very hard, granular, crystalline igneous rock which consists mainly of quartz, mica, and feldspar and is often used as building stone
History
Origin
Pennsylvania, U.S.
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Discoverer
Unknown
Alexander von Humboldt
Etymology
From Greek anthrakites, from anthrax, anthrak meaning coal
From Italian granito, which means grained rock, from grano grain, and from Latin granum
Class
Metamorphic Rocks
Igneous Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Hard Rock
Family
Group
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Plutonic
Other Categories
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock