Rocks are simply defined as an aggregate of minerals. There three classifications Igneous Rocks formed  from cooled lava and magma associated with volcanic activity. Sedimentary Rocks formed from compacting sediments (pebbles, sand and clay) often below sea level. Metamorphic Rocks forms from preexisting rocks that get buried and remain in a solid state while immersed at various levels of heat and pressure. To see my teaching collection click here. 

Click on the image or name below to access each individual rock specimen page.

Igneous Rocks

Sedimentary Rocks

Metamorphic Rocks

Click here for meteorites, tektites, and other rocks

Data: Pellant, Chris. Smithsonian Handbooks. Rocks and Minerals: The clearest recognition guide available. A Dorling Kindersley Book.

<< Back to Mineral Gallery

Specimen Gallery Homepage

Next to Fossil Gallery >>