Definition
Gabbro is an intrusive igneous rock which is chemically equivalent to plutonic Basalt
Pegmatite rock is a holocrystalline, intrusive igneous rock which is composed of interlocking phaneritic crystals
History
Origin
Germany
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Discoverer
Christian Leopold von Buch
R. J. Hauy
Etymology
From Latin glaber bare, smooth, bald
From Greek pegma, pegmat which means- thing joined together + -ite
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