Geology and Earth Science News and Information
Oil and Gas
100+ Gems - Photos of over 100 beautiful gems ranging from the popular to the obscure.
Herkimer Diamonds Doubly-terminated quartz crystals used as specimens and gems.
Fluorescent Minerals and rocks glow with spectacular colors under ultraviolet light.
Where Is Ukraine?
Ukraine is an independent state in eastern Europe that shares a border with Russia to its east.
Grape Agate is a popular mineral specimen with the color and the shape of a bunch of grapes.
Coal Close Up
Coal Through a Microscope - Coal is more than a black rock. It is THE most interesting rock.
Topo Maps - The DeLorme Atlas is an entire state of topo maps in one convenient book.
Rock and Mineral Kits
Rock & Mineral Kits The best way to learn about rocks and minerals is with specimens!
Geology News including: Earth science, mining, gemology, maps, metals, archaeology, and more.
Minerals - Descriptions, photos, articles, properties and uses for common minerals.
Darvaza Gas Crater
The Doorway to Hell is a flaming sinkhole seeping natural gas that has been burning for decades.
Emerald is the most popular green gemstone in the United States and most of the world.
Olivine - Abundant in Earth*s mantle. A constituent of meteorites. The gem peridot.
Don*t Go To Jail
Know the Rules before removing rocks, fossils or minerals from public or private property.
Rock Salt is a sedimentary rock composed of the mineral halite. It has many uses!
Lapis Lazuli - a metamorphic rock and the most popular blue opaque gemstone in history.
Andalusite is a metamorphic mineral and a strongly pleochroic gem material.
Fossils are remains, traces or imprints of ancient life. They reveal Earth's biological history.
World*s Largest Diamonds Records for the largest rough, faceted and carbonado diamond.
Granite - The intrusive igneous rock that underlies continents and countertops.
The Unsung Mineral Hero - and the commodity upon which almost everything is built.
Rocks - Galleries of igneous, sedimentary and metamorphic rock photos with descriptions.
Pele's Hair and Pele's Tears are two unusual types of lava found at Kilauea and Mauna Loa.
Google Earth - Free
Free Google Earth software allows you to browse seamless world satellite images. Free.
Uses of Talc
Talc is a soft mineral used in cosmetics, paper, paint, ceramics and many other products.
Wall Maps - Wall maps of the world, continents, states and the USA.
Birthstones are gems assigned to the month of a person*s birth. They are popular gifts in the U.S.
Largest Earthquake ever recorded - Magnitude 9.5. Chile, 1960.
Crater of Diamonds
Crater of Diamonds - The only diamond mine in the world where you can be the miner.
Hardness Picks - Test for hardness with precise and easy-to-use hardness picks.
Gemstones - Colorful images and articles about diamonds and colored stones.
Gifts That Rock
Gifts That Rock - What are the most popular gift items in the Geology.com store?
Gems from Space
Extraterrestrial Gems - A number of materials from space are used as attractive gems.
San Andreas Fault
What is the San Andreas Fault? Map, photos and description of the fault.
Plate Tectonics - Articles and maps about plate tectonics and the interior of Earth.
Diamonds - Learn about the properties of diamond, its many uses, and diamond discoveries.
Fire Opal is a transparent to translucent opal with a yellow, orange or red background color.
Rhyolite An extrusive igneous rock with a high silica content, produced from granitic magma.
Chalcopyrite - The most important ore of copper for over five thousand years.
Obsidian - the volcanic rock that cools so quickly that it becomes a natural glass.
Cave of the Hands
Cave of the Hands is a cave where ancient people painted hands about 9000 years ago.
Lab-Grown Diamonds? What are they? Can people really make diamonds? Are they real?
Mohs Hardness Scale is a set of reference minerals used for classroom hardness testing.
Meteorites - Rocks that were once parts of planets or large asteroids.
The Brewery Rock ?
The Rock Used to Make Beer - Geologists are beer experts and should know about this rock.
Types Of Eruptions
Types of Volcanic Eruptions - A description of the most common eruption types.
Ruby and Sapphire
Ruby and Sapphire are the 2nd and 3rd most popular colored stones in the United States.
Quartzite is metamorphic rock formed when sandstone is subjected to heat and pressure.
Geology Tools - Rock hammers, field bags, hand lenses, maps, hardness picks, gold pans.
Green River Fossils
The Green River Formation is one of the most famous rock units in the world for its fossils.
California Earthquake Maps - A collection of isoseismal maps for earthquakes in California.
Ilmenite - The primary ore of titanium and source of most titanium dioxide.
Volcanoes - Articles about volcanoes, volcanic hazards and eruptions past and present.
Pictures of Opal - A collection of different types of opal from all around the world and Mars too!
Teacher Resources - K-12 resources for teaching about earth science.
Morganite is an orange to pink gemstone, a variety of beryl, that is growing rapidly in popularity.
Rare Earth Elements
Rare Earths - Special materials used in electronics, defense, medical & many other products.
Largest Hurricanes Are they determined by wind speed, value of damage, most deaths?
Copper is a metal used in coins, electronics, pipes, wiring, motors, alloys and many other products.
Ethiopian Opal - The new opal heavyweight that might give Australia a run.
Bear Attacks - Knowing how to react to a bear encounter or attack could save your life.
Uses of Marble
The Uses of Marble are numerous and diverse. You will be surprised by how it is used.
Rocks on Mars
Rocks on Mars Many of the rocks found on Mars are not very different from Earth rocks.
Rhodochrosite - a manganese mineral used as an ore, a pink gem and an ornamental stone.
What is Geology?
What is Geology? The study of Earth materials, structures, processes and life over time.
Homeowners Insurance might not cover earthquake, hurricane and other geohazard damage.
Mineraloids are amorphous naturally-occurring inorganic solids that lack crystallinity.
Life on Europa?
Life on Europa (a moon of Jupiter) could exist in a salty ocean below its frozen surface.
Shale - The rock that has quickly transformed the oil and gas industry.
Gold Pans and Panning Kits - classifiers, snuffer bottles. Learn how to pan for Gold.
UV Mineral Lamp
Portable UV Lamp - Short and long wave UV for fluorescent mineral viewing.
Zircon is the primary ore of zirconium and a gemstone that is available in many colors.
Geology Books - A variety of books for reference, field trips, reading and more.
Types of Maps
Types of Maps - Explore some of the most popular types of maps that have been made.
Petrified Wood is a fossil that forms when silica replaces and infills the cavities of wood.
Storm Surge can be the most damaging and deadly aspect of a hurricane.
Spatter Cones are small, steep, volcanic cones built of welded basaltic lava.
Charoite is a purple silicate mineral, found only in Russia, used as a gem material.
Labradorite is a feldspar mineral that sometimes exhibits an iridescent play-of-color.
Solar System Volcanoes - Earth is not the only location of volcanic activity.
Fool*s Gold is a name used for pyrite when its brassy color fools people looking for gold.
Rock Tumblers - All about rock tumblers and rock tumbling. Read before you buy a tumbler.
Mount Etna - The most active volcano in Europe continues an eruption that started in 2001.
What Is Luster? Luster is the light-reflecting characteristics of a mineral specimen.
Turquoise - A bluish-green gem material that has been used for over 6000 years.
Debris Flows are moving masses of loose mud, sand, soil, rock and water.
Sand Photo Collection
Sand from Around the World . A photo gallery showing the diversity of the material we call "sand".
Strawberry Quartz is a red to pink quartz with inclusions that look like strawberry seeds.
The Acid Test
The Acid Test - Geologists use dilute hydrochloric acid to identify carbonate minerals.
Coquina - A porous limestone composed almost entirely of fossil debris.
World Record Lightning - this lake has more lightning than any other place in the world.
Dig for Gems at dozens of sites across the United States. Keep what you find at most locations.
Helium is a byproduct of the natural gas industry. Its most important use is in MRI.
Where Are the Canary Islands? Off the northwest coast of Africa, 60 miles west of Morocco.
Waterproof Paper - Don't take chances with your field notes and maps. Use waterproof paper.
Field Courses - Over 80 field courses for undergraduate geology students.
Blue Flames and the largest highly acidic lake in the world at Kawah Ijen Volcano.
Mars Meteorites Mars rovers have found dozens of meteorites while exploring the red planet.
US Diamond Mines
US Diamond Mines - Did you know that diamonds have been mined in the United States?
Ant Hill Garnets
Ant Hill Garnets - tiny gems that ants haul to the surface and discard on their anthill. Honest!
Peridotite is a chromite host rock, a source of diamonds and a possible carbon dioxide sink.
What Is The Moho?
What Is The Moho? The Mohorovicic Discontinuity is the mantle/crust boundary.
Geodes look like ordinary rocks on the outside but can be spectacular inside!
Tanzanite was unknown until a few decades ago but it has erupted into wide popularity.
Great Lakes : Map of the Great Lakes with surrounding states and provinces.
Expansive Soil causes more damage than floods, hurricanes & tornadoes combined.
Hawaiian Hot Spot
How did the Hawaiian Islands Form? The power of a moving plate over a stationary hot spot.
Diamond Misconception - Many people think that diamonds form from coal. Not True!
Tallest Tsunami - A wave with a run-up height of 1720 feet occurred in Lituya Bay, Alaska.
Sliding Rocks Mystery - What causes these rocks to slide across a playa in Death Valley?
Cinnabar - the only important ore of mercury. Used in pigments until its toxicity was realized.
Mineral Rights - Who owns the minerals under your land? Who wants to buy them?
Crystal Habit is the external shape displayed by a crystal or an aggregate of crystals.
What is LNG?
What is LNG? Liquefied Natural Gas. The gas is condensed into a liquid for efficient transport.
Lightning Strikes Map
Lightning Strikes Map by NASA shows the worldwide distribution of lightning activity.
Corundum is the third hardest mineral. It is also the mineral of ruby and sapphire.
Great Rift Valley
The East Africa Rift System - The extensive fault system that is tearing Africa apart.
What is a Maar?
What is a Maar? The second most common volcanic landscape feature on Earth.
Azurite - Used as an ore of copper, a pigment, ornamental stone and gem material.
Tallest Mountain - Everest has rivals in tallness, altitude and distance to the center of Earth.
Mined in America - Small mines in the United States produce a diversity of beautiful gemstones.
Tourmaline - an extremely colorful mineral and gem material.
June 6th 1912
Novarupta - The most powerful volcanic eruption of the 20th century occurred in the U.S.A.
Map of the Oceans
Map of the Oceans - showing the Atlantic, Pacific, Indian, Arctic, and Southern Oceans.
Troglobites are creatures that have adapted to a permanent life in the darkness of a cave.
What is a Geyser?
What is a Geyser? Photos and information about geysers in many parts of the world.
Uses of Gold
The Many Uses of Gold - Unique properties make gold one of the most useful metals.
Soapstone is a metamorphic rock with properties that make it suitable for a variety of projects.
Gem Silica is a blue chalcedony colored by copper. It is the rarest and most valuable chalcedony.
Rock Art - People have been marking on rocks for thousands of years.
Volcanic Explosivity - Rating volcanic eruptions based upon the volume of tephra ejected.
Watch out for Ticks!
Ticks are a problem for geologists in some areas. Learn to recognize and avoid them.
How Are Hurricanes Named? There is a plan for naming tropical storms.
Utica Shale is a major source of oil, natural gas and natural gas liquids in PA, OH and WV.
Citrine is the transparent variety of quartz with a yellow to orange to reddish color.
Greatest Ocean Depth
Deepest Point in the Ocean The deepest point in the ocean is in the Mariana Trench.
Angel Falls in Venezuela is the tallest waterfall in the world - it is 3212 feet tall.
13 Gemmy Facts About Spinel - Is spinel the world*s most overlooked gem?
Fireworks & Minerals
The Science of Fireworks Learn how the colors and shapes are created.
Hematite - The most important ore of iron. A source of mineral pigment since prehistory.
Hand Lens A 10-power folding magnifier in a metal case. A frequently used lab and field tool.
Range of Bear Species - Where you might encounter different types of bears.
What Is Earth Science?
What Is Earth Science? The study of Earth and its neighbors in space. Learn more!
Hawaii*s Next Island could be growing in the Pacific Ocean right now. Its name is Lo*ihi.
The British Isles
Names Used for Great Britain, British Isles, United Kingdom, and Ireland. What they mean.
Largest Volcano - That title is shared by Tamu Massif, Mauna Kea and Ojos del Salado.
Colored Diamonds are diamonds with a noticeable body color. They can sell for over $1M/carat.
Chalk is a variety of limestone formed from fine-grained marine sediment known as ooze.
Mount Vesuvius - geology, history, maps, facts and more about the Vesuvius eruptions.
Cinder Cones are the smallest, simplest, and most common type of volcano.