![Top curves](../../../../jsp/jahia/templates/GSL/gsl_templates/img/keystage3/main_top_grad.gif)
Igneous Rocks
Igneous rocks are formed from molten rock called magma. They are mostly crystalline (made up of interlocking crystals) and usually very hard to break.
Basalt
![Basalt](../../../../webdav/site/GSL/shared/images/education_and_careers/RockCycle/IgeousRocks/basalt1.jpg)
Pumice
![Pumice](../../../../webdav/site/GSL/shared/images/education_and_careers/RockCycle/IgeousRocks/pumice1.jpg)
Gabbro
![Barry Marsh, School of Ocean and Earth Science, University of Southampton](../../../../webdav/site/GSL/shared/images/education_and_careers/RockCycle/IgeousRocks/Gabbro.jpg)
Barry Marsh, School of Ocean and Earth Science, University of Southampton
Gabbro is made of coarse-grained (5mm or so) interlocking crystals. Its overall colour is dark grey but it often contains glassy or pale-coloured crystals of feldspar as well as dark minerals.Granite
![Barry Marsh, School of Ocean and Earth Science, University of Southampton](../../../../webdav/site/GSL/shared/images/education_and_careers/RockCycle/IgeousRocks/Granite.jpg)
Barry Marsh, School of Ocean and Earth Science, University of Southampton
Granite is made of coarse-grained (5mm or so) interlocking crystals. It has more light coloured crystals than dark, usually of white or pink feldspar, glassy quartz, and shiny mica.![Bottom curves](../../../../jsp/jahia/templates/GSL/gsl_templates/img/keystage3/bottom_curve.gif)