Organic Gems are gems formed from or by plants or animals. They might also be fossils.
Scoria is a dark-colored, extrusive igneous rock with abundant vesicles.
||Find Minerals & Gems
Find Minerals and Gems : Dozens of sites where you can dig and keep what you find.
||Rocks on Mars
Rocks on Mars Many of the rocks found on Mars are not very different from Earth rocks.
|Google Earth - Free
Free Google Earth software allows you to browse seamless world satellite images. Free.
Petrified Wood is a fossil that forms when dissolved material preciptates and replaces wood.
Rocks Galleries of igneous, sedimentary and metamorphic rock photos with descriptions.
Geology.com News is updated several times each week. Read it here or receive email updates.
Corundum is the third hardest mineral. It is also the mineral of ruby and sapphire.
Minerals Descriptions, photos, articles, properties and uses for common minerals.
||US Diamond Mines
US Diamond Mines : Did you know that diamonds have been found in the United States?
Abandoned Mine Accidents take 20 to 30 lives per year. Many can be prevented with education.
Homeowners Insurance usually does not cover the most common geologic hazards.
||Sea Level Rise Map
Sea Level Rise Map A Google map that shows where flooding will occur as sea level rises.
Salt Domes are columns of salt that move upwards because of the salt\'s low specific gravity.
||Oil and Gas
Oil and Gas Articles about oil and natural gas in the US and around the world.
Frac Sand The amount of frac sand produced in the USA is up by over 300% since 2009.
Garnet is best known as a red gemstone. It occurs in any color and has many industrial uses.
||Fireworks & Science
The Science of Fireworks Their shapes and colors are produced through chemistry, physics & art.
Olivine is a rock-forming mineral found in the crust, the mantle, and in some meteorites.
Mount Etna The most active volcano in Europe continues an eruption that started in 2001.
||Coal Close Up
Coal Through a Microscope Coal is more than a black rock. It is THE most interesting rock.
Largest Volcano That title is shared by Tamu Massif, Mauna Kea and Ojos del Salado.
Tallest Tsunami A wave with a run-up height of 1720 feet occurred in Lituya Bay, Alaska.
|Gems from Space
Extraterrestrial Gems A number of materials from space are used as attractive gems.
Gemstones Fantastic images and articles about diamonds and colored stones.
||Watch out for Ticks!
Ticks are a problem for geologists in some areas. Learn to recognize and avoid them.
Methane Hydrate deposits contain more fuel value than all other fossil fuels combined.
|Flaring from Space
Flaring from Space at Night Views of Earth show oil field illumination and gas flaring.
Ametrine is a bicolor quartz (amethyst + citrine) and a gemstone of growing popularity.
California Earthquake Maps A collection of isoseismal maps for earthquakes in California.
Sliding Rocks Mystery What causes these rocks to slide across a playa in Death Valley?
Plate Tectonics Articles, maps, information about plate tectonics and the interior of Earth.
Geologist Tools Visit our store for a large selection of field and laboratory tools.
||Types Of Eruptions
Types of Volcanic Eruptions A description of the most common eruption types.
Pavlof Volcano is one of the most active volcanoes in North America and a threat to air traffic.
Diamonds Learn about the properties of diamond, its many uses and diamond discoveries.
Bear Attacks Knowing how to react to a bear encounter or attack could save your life.
Sand is a diverse material. This gallery includes photos of sand from around the world.
||Asteroid Impact Map
Asteroid Impact Map Explore fifty of the most obvious asteroid impact craters on Earth.
Strange Volcanic Landscape! Photos of Dallol Volcano - an explosion crater in Ethiopia.
Sunstone a gem feldspar with aventurescence caused by light reflecting from platy inclusions.
||The Acid Test
The Acid Test Geologists use dilute hydrochloric acid to identify carbonate minerals.
Hydraulic Fracturing Increases well yield by fracturing the reservoir rock with fluid injection.
Diamond Misconception Lots of people think that diamonds form from coal. Not True!
||Volcanoes in Space
Solar System Volcanoes Earth is not the only location of volcanic activity.
Fossils Learn about fossils and fossil discoveries around the world.
||Facts About Copper
Facts About Copper Information about copper uses, production, resources and more.
|San Andreas Fault
The San Andreas Fault A feature that separates the Pacific and North American Plates.
Fluorescent Minerals glow with spectacular colors under ultraviolet light.
Tallest Mountain Everest has rivals in tallness, altitude and distance to the center of Earth.
||USA Landslide Map
Landslide Incidence Map A USGS map showing landslide incidence in the United States.
Volcanic Explosivity Rating volcanic eruptions based upon the volume of tephra ejected.
||Uses of Gold
The Many Uses of Gold Unique properties make gold one of the most useful metals.
Labradorite is a feldspar mineral that sometimes exhibits an iridescent play-of-colors
||Land Below Sea Level
Land Below Sea Level Did you know that dozens of land locations are below sea level?
|Cave of the Hands
Cave of the Hands is a cave where ancient people painted hands about 9000 years ago.
Ammolite is a fossil and a gemstone. It is shell material from fossil ammonites.
||What is a Maar?
What is a Maar? The second most common volcanic landscape feature on Earth.
Rock Art People have been marking on rocks for thousands of years.
|Eagle Ford Shale
Eagle Ford Shale One of the most prolific producers of oil and gas in the United States.
Astronomy Fantastic images and articles about solar system and deep-space astronomy.
Teacher Resources : K-12 resources for teaching about earth science.
Salt Glaciers are masses of salt that flow downslope under their own weight.
Horizontal Drilling has opened new resources and significantly improved productivity.
Largest Desert The Sahara is huge but two polar deserts are larger.
Tanzanite was unknown until a few decades ago but it has erupted into wide popularity.
Fire Opal is a transparent to translucent opal with a yellow, orange or red background color.
Wrong Volcano! The most powerful eruption of the 20th century was misidentified?
||Uses of Marble
The Uses of Marble are numerous and diverse. You will be surprised by how it is used.
||Rare Earth Elements
Rare Earths Special materials used in electronics, defense, medical & many other products.
Largest Earthquake The largest earthquake ever recorded: Chile, 1960, Magnitude 9.5.
Peridotite is a chromite host rock, a source of diamonds and a possible carbon dioxide sink.
Oil Sands contain oil in the form of bitumen. A major oil resource that can be difficult to produce.
Pumice is a rock formed during explosive volcanic eruptions. It has a wide variety of uses.
||What is LNG?
What is LNG? The use of LNG as an energy source is growing rapidly. Learn more about LNG.
Volcanoes Articles about volcanoes, volcanic hazards and eruptions past and present.
Soapstone is a talc-rich rock with properties that make it suitable for a variety of projects.
||What is a Geyser?
Photos of Geysers from around the world with information about height, eruption interval, more.