Definition
Gabbro is an intrusive igneous rock which is chemically equivalent to plutonic Basalt
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
Germany
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Discoverer
Christian Leopold von Buch
Alexander von Humboldt
Etymology
From Latin glaber bare, smooth, bald
From Italian granito, which means grained rock, from grano grain, and from Latin granum
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Hard Rock
Family
Group
Plutonic
Plutonic
Other Categories
Coarse Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock