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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.

Igneous Rocks: Photos, descriptions and facts about intrusive and extrusive igneous rocks.

Metamorphic Rocks: Photos, descriptions and facts about foliated and non-foliated metamorphic rocks.

Sedimentary Rocks: Photos and facts about clastic, chemical and organic sedimentary rocks.


Lapis Lazuli
lapis lazuli
Lapis Lazuli - a metamorphic rock and the most popular blue opaque gemstone in history.
Tumbled Stones
Tumbled Stones
Tumbled Stones are rocks that have been rounded, smoothed and polished in a rock tumbler.
Quartzite a nonfoliated metamorphic rock composed almost entirely of quartz.
Fluorescent Minerals
Fluorescent Minerals
Fluorescent Minerals and rocks glow with spectacular colors under ultraviolet light.
Geology.com Store
Geology gifts
Gifts that Rock! Find something for the rockhound on your holiday shopping list.
Geodes look like ordinary rocks on the outside but can be spectacular inside!
The Brewery Rock ?
The Rock Used to Make Beer - Geologists are beer experts and should know about this rock.
Rock and Mineral Kits
Rock and Mineral Kits
Rock, Mineral and Fossil Collections. Specimens for personal or classroom use.
Sliding Rocks

Sliding Rocks on Racetrack Playa How they slide across a dry lake bed is a mystery.
Trap Rock
trap rock
Trap Rock is a name applied to any dark-colored igneous rock used to produce crushed stone.
Don*t Go To Jail
Don't Go To Jail
Rock Collectors must know the rules before removing rocks from public and private property.
Difficult Rocks
Difficult rocks to identify
Difficult Rocks Elementary students find lots of rocks that you will not be able to identify.
Sand Grains
Sand grains
A Grain of Sand Gallery of sand grains through a microscope by Dr. Gary Greenberg.
Sand is a diverse material. This gallery includes photos of sand from around the world.
Shale The rock that is quickly transforming the energy industry.
Siltstone is a sedimentary rock composed mainly of silt-sized particles.
Rock Tumbling
rock tumblers
Rock Tumblers - All about rock tumblers and rock tumbling. Read before you buy a tumbler.
Tucson Show
Mineral Show Photos
Mineral Show Photos From the 2010 Tucson Gem, Mineral & Fossil Show.
Soapstone is a talc-rich rock with properties that make it suitable for a variety of projects.
Rock Art
Rock art - petroglyphs
Rock Art People have been producing rock art for thousands of years. A world-wide collection.
Unakite is a metamorphosed granite composed of green epidote and pink orthoclase.
Crushed Stone
crushed stone
Crushed Stone - Four tons per person is used each year in the United States.
Uses of Granite
Uses of granite
Uses of Granite The rock used everywhere from the kitchen to the facing stone of skyscrapers.
Antarctic Meteorites
hunting meteorites in Antarctica
The Richest Meteorite Field - More meteorites found here than anywhere else on Earth.
Oil Sands
Oil Sands
Oil Sands contain oil in the form of bitumen - a major oil resource that can be difficult to produce.
Limestone A versatile rock used in cement, food, paint, paper, drugs, concrete & more!
Rocks on Mars
Rocks on Mars
Rocks on Mars Many of the rocks found on Mars are not very different from Earth rocks.
What Are Pictographs? They are drawings or paintings on rocks made by people.
Coal Close Up
Coal Through a Microscope
Coal Through a Microscope Coal is more than a black rock. It\'s THE most interesting rock.
Gold Panning Kits
Gold Pans
Gold Pans and Panning Kits - classifiers, snuffer bottles. Learn how to pan for gold!
Yosemite rockfall
Spectacular Yosemite Rockfall A photo sequence of rockfall and debris avalanche by Herb Dunn.
Azurite Granite ?
Azurite Granite?
Azurite Granite? Found at the base of K2, the second highest mountain in the world.
Forensic Geology
Forensic Geology
Forensic Geology My students come to class thinking that dirt is dirt and sand is sand...
CO2-rich lava
CO2-rich lava
Carbonatite Lava Flows at Oldoinyo Lengai CO2-rich lavas that flow like motor oil.
Hand Lens
Hand Lens
Hand Lens A 10-power folding magnifier in a metal case. A frequently used lab and field tool.
Geology Tools
Geology Tools
Geology Tools - Hammers, field bags, hand lenses, maps, hardness picks, gold pans.
Fee Mining
Fee Mining
Fee Mining sites are mines that you can enter, pay a fee, and keep anything that you find.