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Rocks: Igneous, Metamorphic and Sedimentary
Rocks hold the history of the earth and the materials that will be used to build its future.
Geodes look like ordinary rocks on the outside but can be spectacular inside!
Rock and Mineral Kits
Rock, Mineral and Fossil Collections. Specimens for personal or classroom use.
Hardness Picks - Test for hardness with precise and easy-to-use hardness picks.
Gifts That Rock
Gifts That Rock - What are the most popular gift items in the Geology.com store?
Flint, Chert, Jasper
Flint, Chert, and Jasper are types of chalcedony and names for microcrystalline quartz.
Tumbled Stones are rocks that have been rounded, smoothed and polished in a rock tumbler.
Fluorescent Minerals and rocks glow with spectacular colors under ultraviolet light.
Lapis Lazuli - a metamorphic rock and the most popular blue opaque gemstone in history.
The Brewery Rock ?
The Rock Used to Make Beer - Geologists are beer experts and should know about this rock.
Trap Rock is a name applied to any dark-colored igneous rock used to produce crushed stone.
Rock Salt is a sedimentary rock composed of the mineral halite. It has many uses!
Quartzite a nonfoliated metamorphic rock composed almost entirely of quartz.
A Grain of Sand Gallery of sand grains through a microscope by Dr. Gary Greenberg.
Geology Dictionary - contains thousands of geological terms with their definitions.
Puddingstone - a conglomerate with clasts that contrast in color with the matrix. Alamy Images.
Sliding Rocks on Racetrack Playa How they slide across a dry lake bed is a mystery.
Charoitite - a purple metamorphic rock dominated by the mineral charoite. It is used as a gem.
Shale The rock that is quickly transforming the energy industry.
Difficult Rocks Elementary students find lots of rocks that you will not be able to identify.
Mariposite - a name used for green chromium-rich micas and certain rocks colored by them.
The Unsung Mineral Hero - and the commodity upon which almost everything is built.
Don*t Go To Jail
Rock Collectors must know the rules before removing rocks from public and private property.
Rock Tumblers - All about rock tumblers and rock tumbling. Read before you buy a tumbler.
Rock Art People have been producing rock art for thousands of years. A world-wide collection.
Sand is a diverse material. This gallery includes photos of sand from around the world.
Soapstone is a talc-rich rock with properties that make it suitable for a variety of projects.
Rocks on Mars
Rocks on Mars Many of the rocks found on Mars are not very different from Earth rocks.
Coquina - A porous limestone composed almost entirely of fossil debris.
Uses of Granite
Uses of Granite The rock used everywhere from the kitchen to the facing stone of skyscrapers.
Chalk is a variety of limestone formed from fine-grained marine sediment known as ooze.
Siltstone is a sedimentary rock composed mainly of silt-sized particles.
Rock-Forming Minerals - most of Earth*s crust is made up of a small number of minerals.
Unakite is a metamorphosed granite composed of green epidote and pink orthoclase.
Oil Sands contain oil in the form of bitumen - a major oil resource that can be difficult to produce.
Igneous and Volcanic
Igneous and Volcanic Features an introduction to how these rocks occur below and above ground.
Gold Panning Kits
Gold Pans and Panning Kits - classifiers, snuffer bottles. Learn how to pan for gold!
Spectacular Yosemite Rockfall A photo sequence of rockfall and debris avalanche by Herb Dunn.
The Richest Meteorite Field - More meteorites found here than anywhere else on Earth.
Limestone A versatile rock used in cement, food, paint, paper, drugs, concrete & more!
What Are Pictographs? They are drawings or paintings on rocks made by people.
Mineral Show Photos From the 2010 Tucson Gem, Mineral & Fossil Show.
Curling Stones are made from a special type of granite, found at just a few locations worldwide.
Azurite Granite ?
Azurite Granite? Found at the base of K2, the second highest mountain in the world.
Coal Close Up
Coal Through a Microscope Coal is more than a black rock. It\'s THE most interesting rock.
Forensic Geology My students come to class thinking that dirt is dirt and sand is sand...
Diabase - the rock selected for Stonehenge and transported 240 miles in 2100 BC.
Dacite - a light-colored extrusive igneous rock intermediate between rhyolite and andesite.
Caliche is a lithified layer in soil or sediment. It is considered to be a sedimentary rock.
Hand Lens A 10-power folding magnifier in a metal case. A frequently used lab and field tool.
Geology Tools - Rock hammers, field bags, hand lenses, maps, hardness picks, gold pans.