Geology and Earth Science News and Information
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Gem Silica is a blue chalcedony colored by copper. It is the rarest and most valuable chalcedony.
The British Isles
Names Used for Great Britain, British Isles, United Kingdom, and Ireland. What they mean.
Tallest Mountain - Everest has rivals in tallness, altitude and distance to the center of Earth.
Rock and Mineral Kits
Rock & Mineral Kits The best way to learn about rocks and minerals is with specimens!
Petrified Wood is a fossil that forms when silica replaces and infills the cavities of wood.
Geology News including: Earth science, mining, gemology, maps, metals, archaeology, and more.
What is a Maar?
What is a Maar? The second most common volcanic landscape feature on Earth.
Where Is Belarus?
Belarus forms a 400-mile long border with northern Ukraine, about 50 miles north of Kyiv.
Hawaiian Hot Spot
How did the Hawaiian Islands Form? The power of a moving plate over a stationary hot spot.
Great Rift Valley
The East Africa Rift System - The extensive fault system that is tearing Africa apart.
Ethiopian Opal - The new opal heavyweight that might give Australia a run.
Geodes look like ordinary rocks on the outside but can be spectacular inside!
Canadian Diamond Mines produce some of the largest and highest quality diamonds!
Diamonds - Learn about the properties of diamond, its many uses, and diamond discoveries.
What Is Earth Science?
What Is Earth Science? The study of Earth and its neighbors in space. Learn more!
Turquoise - A bluish-green gem material that has been used for over 6000 years.
100+ Gems - Photos of over 100 beautiful gems ranging from the popular to the obscure.
Hawaii*s Next Island could be growing in the Pacific Ocean right now. Its name is Lo*ihi.
Minerals - Descriptions, photos, articles, properties and uses for common minerals.
Largest Earthquake ever recorded - Magnitude 9.5. Chile, 1960.
Horizontal Drilling has opened new resources and significantly improved productivity.
Where Is Ukraine?
Ukraine is an independent state in eastern Europe that shares a border with Russia to its east.
Rocks - Galleries of igneous, sedimentary and metamorphic rock photos with descriptions.
Largest Volcano - That title is shared by Tamu Massif, Mauna Kea and Ojos del Salado.
Fluorescent Minerals and rocks glow with spectacular colors under ultraviolet light.
Chalk is a variety of limestone formed from fine-grained marine sediment known as ooze.
Cinder Cones are the smallest, simplest, and most common type of volcano.
Herkimer Diamonds Doubly-terminated quartz crystals used as specimens and gems.
Grape Agate is a popular mineral specimen with the color and the shape of a bunch of grapes.
Wall Maps - Wall maps of the world, continents, states and the USA.
Google Earth - Free
Free Google Earth software allows you to browse seamless world satellite images. Free.
Granite - The intrusive igneous rock that underlies continents and countertops.
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.
Emerald is the most popular green gemstone in the United States and most of the world.
Darvaza Gas Crater
The Doorway to Hell is a flaming sinkhole seeping natural gas that has been burning for decades.
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.
Birthstones are gems assigned to the month of a person*s birth. They are popular gifts in the U.S.
Lapis Lazuli - a metamorphic rock and the most popular blue opaque gemstone in history.
Hardness Picks - Test for hardness with precise and easy-to-use hardness picks.
Obsidian - the volcanic rock that cools so quickly that it becomes a natural glass.
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!
Plate Tectonics - Articles and maps about plate tectonics and the interior of Earth.
Andalusite is a metamorphic mineral and a strongly pleochroic gem material.
Pele's Hair and Pele's Tears are two unusual types of lava found at Kilauea and Mauna Loa.
Crater of Diamonds
Crater of Diamonds - The only diamond mine in the world where you can be the miner.
Gemstones - Colorful images and articles about diamonds and colored stones.
San Andreas Fault
What is the San Andreas Fault? Map, photos and description of the fault.
Teacher Resources - K-12 resources for teaching about earth science.
The Unsung Mineral Hero - and the commodity upon which almost everything is built.
Types of Maps
Types of Maps - Explore some of the most popular types of maps that have been made.
Pictures of Opal - A collection of different types of opal from all around the world and Mars too!
Copper is a metal used in coins, electronics, pipes, wiring, motors, alloys and many other products.
Chalcopyrite - The most important ore of copper for over five thousand years.
Gems from Space
Extraterrestrial Gems - A number of materials from space are used as attractive gems.
Uses of Talc
Talc is a soft mineral used in cosmetics, paper, paint, ceramics and many other products.
The Brewery Rock ?
The Rock Used to Make Beer - Geologists are beer experts and should know about this rock.
Cave of the Hands
Cave of the Hands is a cave where ancient people painted hands about 9000 years ago.
Ruby and Sapphire
Ruby and Sapphire are the 2nd and 3rd most popular colored stones in the United States.
Rhyolite An extrusive igneous rock with a high silica content, produced from granitic magma.
Quartzite is metamorphic rock formed when sandstone is subjected to heat and pressure.
Meteorites - Rocks that were once parts of planets or large asteroids.
Fire Opal is a transparent to translucent opal with a yellow, orange or red background color.
Mohs Hardness Scale is a set of reference minerals used for classroom hardness testing.
Bear Attacks - Knowing how to react to a bear encounter or attack could save your life.
Geology Books - A variety of books for reference, field trips, reading and more.
Geology Tools - Rock hammers, field bags, hand lenses, maps, hardness picks, gold pans.
UV Mineral Lamp
Portable UV Lamp - Short and long wave UV for fluorescent mineral viewing.
Gifts That Rock
Gifts That Rock - What are the most popular gift items in the Geology.com store?
Lab-Grown Diamonds? What are they? Can people really make diamonds? Are they real?
Labradorite is a feldspar mineral that sometimes exhibits an iridescent play-of-color.
Strawberry Quartz is a red to pink quartz with inclusions that look like strawberry seeds.
Shale - The rock that has quickly transformed the oil and gas industry.
Volcanic Explosivity - Rating volcanic eruptions based upon the volume of tephra ejected.
Uses of Marble
The Uses of Marble are numerous and diverse. You will be surprised by how it is used.
Solar System Volcanoes - Earth is not the only location of volcanic activity.
California Earthquake Maps - A collection of isoseismal maps for earthquakes in California.
Volcanoes - Articles about volcanoes, volcanic hazards and eruptions past and present.
Largest Hurricanes Are they determined by wind speed, value of damage, most deaths?
Corundum is the third hardest mineral. It is also the mineral of ruby and sapphire.
What Is The Moho?
What Is The Moho? The Mohorovicic Discontinuity is the mantle/crust boundary.
Types Of Eruptions
Types of Volcanic Eruptions - A description of the most common eruption types.
Morganite is an orange to pink gemstone, a variety of beryl, that is growing rapidly in popularity.
Fool*s Gold is a name used for pyrite when its brassy color fools people looking for gold.
Green River Fossils
The Green River Formation is one of the most famous rock units in the world for its fossils.
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.
Waterproof Paper - Don't take chances with your field notes and maps. Use waterproof paper.
Mineraloids are amorphous naturally-occurring inorganic solids that lack crystallinity.
Homeowners Insurance might not cover earthquake, hurricane and other geohazard damage.
Ilmenite - The primary ore of titanium and source of most titanium dioxide.
Diamond Misconception - Many people think that diamonds form from coal. Not True!
Mined in America - Small mines in the United States produce a diversity of beautiful gemstones.
How Are Hurricanes Named? There is a plan for naming tropical storms.
What is Geology?
What is Geology? The study of Earth materials, structures, processes and life over time.
Hand Lens A 10-power folding magnifier in a metal case. A frequently used lab and field tool.
Sand Photo Collection
Sand from Around the World . A photo gallery showing the diversity of the material we call "sand".
What Is Luster? Luster is the light-reflecting characteristics of a mineral specimen.
Rhodochrosite - a manganese mineral used as an ore, a pink gem and an ornamental stone.
Spatter Cones are small, steep, volcanic cones built of welded basaltic lava.
Rock Tumblers - All about rock tumblers and rock tumbling. Read before you buy a tumbler.
Rare Earth Elements
Rare Earths - Special materials used in electronics, defense, medical & many other products.
Peridotite is a chromite host rock, a source of diamonds and a possible carbon dioxide sink.
Lightning Strikes Map
Lightning Strikes Map by NASA shows the worldwide distribution of lightning activity.
Greatest Ocean Depth
Deepest Point in the Ocean The deepest point in the ocean is in the Mariana Trench.
Soapstone is a metamorphic rock with properties that make it suitable for a variety of projects.
Life on Europa?
Life on Europa (a moon of Jupiter) could exist in a salty ocean below its frozen surface.
Uses of Gold
The Many Uses of Gold - Unique properties make gold one of the most useful metals.
Mineral Rights - Who owns the minerals under your land? Who wants to buy them?
Charoite is a purple silicate mineral, found only in Russia, used as a gem material.
World Record Lightning - this lake has more lightning than any other place in the world.
Crystal Habit is the external shape displayed by a crystal or an aggregate of crystals.
Debris Flows are moving masses of loose mud, sand, soil, rock and water.
Dig for Gems at dozens of sites across the United States. Keep what you find at most locations.
Great Lakes : Map of the Great Lakes with surrounding states and provinces.
Mount Etna - The most active volcano in Europe continues an eruption that started in 2001.
13 Gemmy Facts About Spinel - Is spinel the world*s most overlooked gem?
Where Are the Canary Islands? Off the northwest coast of Africa, 60 miles west of Morocco.
Expansive Soil causes more damage than floods, hurricanes & tornadoes combined.
Rocks on Mars
Rocks on Mars Many of the rocks found on Mars are not very different from Earth rocks.
Mars Meteorites Mars rovers have found dozens of meteorites while exploring the red planet.
The Acid Test
The Acid Test - Geologists use dilute hydrochloric acid to identify carbonate minerals.
Gold Pans and Panning Kits - classifiers, snuffer bottles. Learn how to pan for Gold.
Tourmaline - an extremely colorful mineral and gem material.
Field Courses - Over 80 field courses for undergraduate geology students.
Troglobites are creatures that have adapted to a permanent life in the darkness of a cave.
Colored Diamonds are diamonds with a noticeable body color. They can sell for over $1M/carat.
Tallest Tsunami - A wave with a run-up height of 1720 feet occurred in Lituya Bay, Alaska.
Helium is a byproduct of the natural gas industry. Its most important use is in MRI.
Ant Hill Garnets
Ant Hill Garnets - tiny gems that ants haul to the surface and discard on their anthill. Honest!
What is a Geyser?
What is a Geyser? Photos and information about geysers in many parts of the world.
Blue Flames and the largest highly acidic lake in the world at Kawah Ijen Volcano.
Watch out for Ticks!
Ticks are a problem for geologists in some areas. Learn to recognize and avoid them.
Zircon is the primary ore of zirconium and a gemstone that is available in many colors.
Tanzanite was unknown until a few decades ago but it has erupted into wide popularity.
Citrine is the transparent variety of quartz with a yellow to orange to reddish color.
What is LNG?
What is LNG? Liquefied Natural Gas. The gas is condensed into a liquid for efficient transport.
Storm Surge can be the most damaging and deadly aspect of a hurricane.
Coquina - A porous limestone composed almost entirely of fossil debris.
Map of the Oceans
Map of the Oceans - showing the Atlantic, Pacific, Indian, Arctic, and Southern Oceans.
Range of Bear Species - Where you might encounter different types of bears.
Rock Art - People have been marking on rocks for thousands of years.
June 6th 1912
Novarupta - The most powerful volcanic eruption of the 20th century occurred in the U.S.A.
Hematite - The most important ore of iron. A source of mineral pigment since prehistory.
US Diamond Mines
US Diamond Mines - Did you know that diamonds have been mined in the United States?
Azurite - Used as an ore of copper, a pigment, ornamental stone and gem material.
Mount Vesuvius - geology, history, maps, facts and more about the Vesuvius eruptions.
Fireworks & Minerals
The Science of Fireworks Learn how the colors and shapes are created.
Angel Falls in Venezuela is the tallest waterfall in the world - it is 3212 feet tall.
Utica Shale is a major source of oil, natural gas and natural gas liquids in PA, OH and WV.