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The three main types of rocks are igneous, metamorphic, and sedimentary.

en.wikipedia.org/wiki/List_of_rock_types

A list of rock types recognized by petrologists. There is no agreed number of specific types of rocks. Any unique combination of chemical composition, ...

www.learner.org/interactives/rockcycle/types.html

Types of Rocks. Rocks are not all the same! The three main types, or classes, of rock are sedimentary, metamorphic, and igneous and the differences among ...

jersey.uoregon.edu/~mstrick/AskGeoMan/geoQuerry13.html

Just as any person can be put into one of two main categories of human being, all rocks can be put into one of three fundamentally different types of rocks.

geology.com/rocks

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

www.kidsloverocks.com/html/types_of_rocks.html

Types of Rocks. Rocks come in many different colors, shapes, and sizes. Because no two rocks are exactly alike, they are a lot of fun to collect. Your rock ...

.ask.com/youtube?q=Type+of+Rocks&v=17l2LrjZi9o
Aug 10, 2015 ... You will learn about "3 Types of Rocks" in this video. Rocks can be broadly divided into three types on the bases of their formation, namely ...

en.wikibooks.org/wiki/Identifying_Rocks_and_Minerals/Types_of_Rocks

There are three different types of rocks: Igneous, Sedimentary, and Metamorphic. The difference between each type is in how they are formed.

www.thoughtco.com/rock-identification-tables-1441174

Mar 10, 2017 ... Identify 44 of the most common igneous, sedimentary and metamorphic rock types with this handy rock identification chart.

www.sandatlas.org/rock-types

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