Definition
Gritstone or grit is a hard, coarse-grained, siliceous sandstone
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
Pennines, England
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Discoverer
J.J. Ferber
Alexander von Humboldt
Etymology
From Grit + Stone
From Italian granito, which means grained rock, from grano grain, and from Latin granum
Class
Sedimentary Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Hard Rock
Family
Group
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Plutonic
Other Categories
Coarse Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock