Geology and Earth Science News and Information

100+ Gems - Photos of over 100 beautiful gems ranging from the popular to the obscure.

Crater of Diamonds - The only diamond mine in the world where you can be the miner.

Chalk is a variety of limestone formed from fine-grained marine sediment known as ooze.

Rare Earths - Special materials used in electronics, defense, medical & many other products.

Wall Maps - Wall maps of the world, continents, states and the USA.

Rocks on Mars Many of the rocks found on Mars are not very different from Earth rocks.

The Uses of Marble are numerous and diverse. You will be surprised by how it is used.

Mount Vesuvius - geology, history, maps, facts and more about the Vesuvius eruptions.

Zircon is the primary ore of zirconium and a gemstone that is available in many colors.

Pyroxene Minerals are a group of chain silicate minerals found in igneous and metamorphic rocks.

Know the Rules before removing rocks, fossils or minerals from public or private property.

Horizontal Drilling has opened new resources and significantly improved productivity.

Hardness Picks - Test for hardness with precise and easy-to-use hardness picks.

Fire Opal is a transparent to translucent opal with a yellow, orange or red background color.

Geology Tools Rock hammers, field bags, hand lenses, maps, hardness picks, gold pans.

Ruby and Sapphire are the 2nd and 3rd most popular colored stones in the United States.

Rock & Mineral Kits The best way to learn about rocks and minerals is with specimens!

Largest Earthquake ever recorded - Magnitude 9.5. Chile, 1960.

Types of Volcanic Eruptions - A description of the most common eruption types.

The Next Hawaiian Island could be growing in the Pacific Ocean right now. Its name is Lo'ihi.

World Record Lightning - this lake has more lightning than any other place in the world.

Talc is a soft mineral used in cosmetics, paper, paint, ceramics and many other products.

Obsidian - the volcanic rock that cools so quickly that it becomes a natural glass.

Debris Flows are moving masses of loose mud, sand, soil, rock and water.

Rock Tumblers - All about rock tumblers and rock tumbling. Read before you buy a tumbler.

Rocks - Galleries of igneous, sedimentary and metamorphic rock photos with descriptions.

Volcanic Explosivity - Rating volcanic eruptions based upon the volume of tephra ejected.

Mohs Hardness Scale is a set of reference minerals used for classroom hardness testing.

What is the San Andreas Fault? Map, photos and description of the fault.

Fool*s Gold is a name used for pyrite when its brassy color fools people looking for gold.

Tallest Tsunami - A wave with a run-up height of 1720 feet occurred in Lituya Bay, Alaska.

Morganite is an orange to pink gemstone, a variety of beryl, that is growing rapidly in popularity.

Pictures of Opal - A collection of different types of opal from all around the world and Mars too!

Mined in America - Small mines in the United States produce a diversity of beautiful gemstones.

Mars Meteorites Mars rovers have found dozens of meteorites traveling around the red planet.

Geology News - News about geology, earth science, energy, and more. Updated daily.

US Diamond Mines - Did you know that diamonds have been mined in the United States?

Minerals - Descriptions, photos, articles, properties and uses for common minerals.

Rhyolite An extrusive igneous rock with a high silica content, produced from granitic magma.

The Acid Test - Geologists use dilute hydrochloric acid to identify carbonate minerals.

Portable UV Lamp - Short and long wave UV for fluorescent mineral viewing.

Geology Books - A variety of books for reference, field trips, reading and more.

Utica Shale is a major source of oil, natural gas and natural gas liquids in PA, OH and WV.

Birthstones are gems assigned to the month of a person*s birth. They are popular gifts in the U.S.

Copper Kills COVID-19 and many other pathogens to limit the spread of disease.

Diamonds - Learn about the properties of diamond, its many uses, and diamond discoveries.

Shale - The rock that has quickly transformed the oil and gas industry.

Cinnabar - the only important ore of mercury. Used in pigments until its toxicity was realized.

Sand is a diverse material. This gallery includes photos of sand from around the world.

Chalcopyrite - The most important ore of copper for over five thousand years.

The Rock Used to Make Beer - Geologists are beer experts and should know about this rock.

Plate Tectonics - Articles and maps about plate tectonics and the interior of Earth.

Coquina - A porous limestone composed almost entirely of fossil debris.

Bear Attacks - Knowing how to react to a bear encounter or attack could save your life.

Rock Art - People have been marking on rocks for thousands of years.

Solar System Volcanoes - Earth is not the only location of volcanic activity.

Geodes look like ordinary rocks on the outside but can be spectacular inside!

Blue Flames and the largest highly acidic lake in the world at Kawah Ijen Volcano.

Meteorites - Rocks that were once parts of planets or large asteroids.

Types of Maps - Explore some of the most popular types of maps that have been made.

Gemstones - Colorful images and articles about diamonds and colored stones.

Ant Hill Garnets - tiny gems that ants haul to the surface and discard on their anthill. Honest!

World*s Largest Diamonds Records for the largest rough, faceted and carbonado diamond.

Free Google Earth software allows you to browse seamless world satellite images. Free.

Mineraloids are amorphous naturally-occurring inorganic solids that lack crystallinity.

The Many Uses of Gold - Unique properties make gold one of the most useful metals.

What is Geology? The study of Earth materials, structures, processes and life over time.

Fluorescent Minerals and rocks glow with spectacular colors under ultraviolet light.

Diabase - the rock selected for Stonehenge and transported 240 miles in 2100 BC.

Expansive Soil causes more damage than floods, hurricanes & tornadoes combined.

Teacher Resources - K-12 resources for teaching about earth science.

Quartzite is metamorphic rock formed when sandstone is subjected to heat and pressure.

Hand Lens A 10-power folding magnifier in a metal case. A frequently used lab and field tool.

Colored Diamonds are diamonds with a noticeable body color. They can sell for over $1M/carat.

Labradorite is a feldspar mineral that sometimes exhibits an iridescent play-of-color.

Field Courses - Over 80 field courses for undergraduate geology students.

Corundum is the third hardest mineral. It is also the mineral of ruby and sapphire.

Ethiopian Opal - The new opal heavyweight that might give Australia a run.

Sliding Rocks Mystery - What causes these rocks to slide across a playa in Death Valley?

What Is The Moho? The Mohorovicic Discontinuity is the mantle/crust boundary.

Granite - The intrusive igneous rock that underlies continents and countertops.

Diamond Misconception - Many people think that diamonds form from coal. Not True!

Waterproof Paper - Don't take chances with your field notes and maps. Use waterproof paper.

Hematite - The most important ore of iron. A source of mineral pigment since prehistory.

Extraterrestrial Gems - A number of materials from space are used as attractive gems.

Novarupta - The most powerful volcanic eruption of the 20th century occurred in the U.S.A.

Olivine - Abundant in Earth*s mantle. A constituent of meteorites. The gem peridot.

Mount Etna - The most active volcano in Europe continues an eruption that started in 2001.

Peridotite is a chromite host rock, a source of diamonds and a possible carbon dioxide sink.

Tallest Mountain - Everest has rivals in tallness, altitude and distance to the center of Earth.

Ticks are a problem for geologists in some areas. Learn to recognize and avoid them.

Tanzanite was unknown until a few decades ago but it has erupted into wide popularity.

Coal Through a Microscope - Coal is more than a black rock. It is THE most interesting rock.

Names Used for Great Britain, British Isles, United Kingdom, and Ireland. What they mean.

Range of Bear Species - Where you might encounter different types of bears.

Emerald is the most popular green gemstone in the United States and most of the world.

Topo Maps - The DeLorme Atlas is an entire state of topo maps in one convenient book.

The East Africa Rift System - The extensive fault system that is tearing Africa apart.

Cave of the Hands is a cave where ancient people painted hands about 9000 years ago.

Turquoise - A bluish-green gem material that has been used for over 6000 years.

What is a Geyser? Photos and information about geysers in many parts of the world.

What is a Maar? The second most common volcanic landscape feature on Earth.

Deepest Point in the Ocean The deepest point in the ocean is in the Mariana Trench.

Lightning Strikes Map by NASA shows the worldwide distribution of lightning activity.

Landslides A USGS fact sheet about landslides and events that trigger them.

California Earthquake Maps - A collection of isoseismal maps for earthquakes in California.

Ilmenite - The primary ore of titanium and source of most titanium dioxide.

Petrified Wood is a fossil that forms when silica replaces and infills the cavities of wood.

Grape Agate is a popular mineral specimen with the color and the shape of a bunch of grapes.

Molybdenite is the primary ore of molybdenum which is used in superalloys and as a lubricant.

Largest Volcano - That title is shared by Tamu Massif, Mauna Kea and Ojos del Salado.

Herkimer Diamonds Doubly-terminated quartz crystals used as specimens and gems.

Tourmaline - an extremely colorful mineral and gem material.

Charoite is a purple silicate mineral, found only in Russia, used as a gem material.

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.

Gifts That Rock - What are the most popular gift items in the Geology.com store?

Homeowners Insurance might not cover earthquake, hurricane and other geohazard damage.

Methane Hydrate deposits contain more fuel value than all other fossil fuels combined.

Angel Falls in Venezuela is the tallest waterfall in the world - it is 3212 feet tall.

Mineral Rights - Who owns the minerals under your land? Who wants to buy them?

Lapis Lazuli - a metamorphic rock and the most popular blue opaque gemstone in history.

Largest Hurricanes Are they determined by wind speed, value of damage, most deaths?

Azurite - Used as an ore of copper, a pigment, ornamental stone and gem material.

Citrine is the transparent variety of quartz with a yellow to orange to reddish color.

Mount Cleveland is an active volcano in the Aleutian Islands and a threat to air traffic.

How did the Hawaiian Islands Form? The power of a moving plate over a stationary hot spot.

Volcanoes - Articles about volcanoes, volcanic hazards and eruptions past and present.

How Are Hurricanes Named? There is a plan for naming tropical storms.

Hydraulic Fracturing increases well yield by fracturing the reservoir rock with fluid injection.

The Unsung Mineral Hero - and the commodity upon which almost everything is built.

Storm Surge can be the most damaging and deadly aspect of a hurricane.

Rhodochrosite - a manganese mineral used as an ore, a pink gem and an ornamental stone.

Gold Pans and Panning Kits - classifiers, snuffer bottles. Learn how to pan for Gold.

What Is Earth Science? The study of Earth and its neighbors in space. Learn more!