Rocks: Igneous, Metamorphic and Sedimentary - Geology.com
Home » Rocks. Rocks: Igneous, Metamorphic and Sedimentary Rocks hold the history of the earth and the materials that will be used to build its future.
Sedimentary Rocks | Pictures, Characteristics, Textures, Types
Organic sedimentary rocks form from the accumulation of plant or animal debris. Examples include: chalk, coal, diatomite, some dolomites, and some limestones. Photos and brief descriptions of some common sedimentary rock types are shown on this page.
Igneous Rocks | Pictures of Intrusive and Extrusive Rock Types
Extrusive igneous rocks erupt onto the surface, where they cool quickly to form small crystals. Some cool so quickly that they form an amorphous glass. These rocks include: andesite, basalt, dacite, obsidian, pumice, rhyolite, scoria, and tuff. Pictures and brief descriptions of some common igneous rock types are shown on this page.
Meteorite Identification: Have you found a space rock?
Identification of a genuine meteorite takes a practiced eye, but there are a number of simple tests that can help hopeful rock hounds determine if they have stumbled across a rare space rock, or just a common earthbound stone.
Tumbled Stones: What are tumbled stones? How are they made?
Tumbled stones are pieces of rocks and minerals that have been rounded, smoothed and polished into beautiful gemstones in a rock tumbler.
The Most Difficult Rocks to Identify | Teaching Rock Identification
Rocks: Galleries of igneous, sedimentary and metamorphic rock photos with descriptions. Minerals: Information about ore minerals, gem materials and rock-forming minerals. Volcanoes: Articles about volcanoes, volcanic hazards and eruptions past and present.
Rock and Mineral Books - Geology.com
"The introductory guide to the basics of geology and to collecting and identifying rocks." Loaded with illustrations and full-color diagrams, photos, pictures, and sketches. Discover what Earth science is all about with this popular book!
Mineral Properties, Photos, Uses and Descriptions - Geology.com
Photos and information about 80 common rock-forming, ore and gemstone minerals from around the world.
Granite: Igneous Rock - Pictures, Definition & More - Geology.com
Granite is a coarse-grained, light-colored igneous rock composed mainly of feldspars and quartz; it also contains minor amounts of mica and amphibole minerals (see the accompanying chart titled Generalized Composition Ranges of Common Igneous Rocks). Once students know how to identify the minerals in granite, this simple description enables ...
Gemstones: Facts, photos, and information for over 100 gems.
Tumbled Stones are rocks that have been rounded, smoothed and polished in a rock tumbler. Gems from Space Extraterrestrial Gems A number of materials from space are used as attractive gems.