The following is a list of rock types recognized by geologists. There is no agreed number of specific types of rock. Any unique combination of chemical composition, mineralogy, grain size, texture, or …

Jul 9, 2023 · Learn about the three types of rocks: igneous, sedimentary, and metamorphic. Learn their characteristics and get examples of each type.

Jun 19, 2025 · List of all Igneous, Sedimentary, and Metamorphic Rock Types with Pictures and Links to Specific Articles about each Type of Rock.

Photographs and information for a large collection of igneous, metamorphic and sedimentary rocks. Geology.com

Learn about the three types of rock, and see photo examples of each.

A clear, scientifically grounded overview of what rocks are, how the three major rock types form, and why rock classification matters in geology and engineering.

Nov 25, 2025 · Rock, in geology, naturally occurring and coherent aggregate of one or more minerals. Such aggregates constitute the basic unit of which the solid Earth is composed and typically form …

Apr 19, 2025 · In this article, we’ll break down the three main types of rocks – igneous, sedimentary, and metamorphic in a way that’s easy to follow, informative, and yes, even a bit fun.

In summary, the three primary types of rocks — igneous, sedimentary, and metamorphic — are distinguished by their formation processes, mineral composition, and texture.

The three main rock types are igneous, sedimentary, and metamorphic. Crystallization, erosion and sedimentation, and metamorphism transform one rock type into another or change sediments into rock.