Definition
Pegmatite rock is a holocrystalline, intrusive igneous rock which is composed of interlocking phaneritic crystals
Icelandite belongs to volcanic igneous rocks which is rich in iron and belongs to andesite rock
History
Origin
-
Iceland
Discoverer
R. J. Hauy
Ian S. E. Carmichael
Etymology
From Greek pegma, pegmat which means- thing joined together + -ite
From its origin place near Cenozoic volcano near the parsonage Þingmúli in East Iceland
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Hard Rock
Family
Group
Plutonic
Volcanic
Other Categories
Coarse Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock