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Categories
Diamonds
Earthquakes
Fossils
Gemstones
General Geology
Geologic Hazards
Gold
Landslides
Metals
Meteorites
Minerals
Oil and Gas
Plate Tectonics
Rocks
Satellite Images
Teacher Resources
U.S. Maps
Volcanoes
World Maps
World Records

Minerals

Minerals - Descriptions, photos, articles, properties and uses for common minerals.
Gifts That Rock
TYTG Accesorios de Piezas de microscopio 0. 5X c- Adapta
Gifts That Rock - What are the most popular gift items in the Geology.com store?
Rock Salt

Rock Salt is a sedimentary rock composed of the mineral halite. It has many uses!
Lapis Lazuli

Lapis Lazuli - a metamorphic rock and the most popular blue opaque gemstone in history.
Don*t Go To Jail

Xinanlongjb ZZB-Metals, 1pc Diámetro 0,8 mm a 70 mm Redo before removing rocks, fossils or minerals from public or private property.
Granite

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

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

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

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

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

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

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

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

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

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

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

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

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

The Green River Formation is one of the most famous rock units in the world for its fossils.
Ilmenite

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

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

Types of Volcanic Eruptions - A description of the most common eruption types.
The Brewery Rock ?

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

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

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

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

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

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

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

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

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

Copper is a metal used in coins, electronics, pipes, wiring, motors, alloys and many other products.
Bear Attacks

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

Spatter Cones are small, steep, volcanic cones built of welded basaltic lava.
Gems from Space

YuChiSX 19 piezas de artesanía de cuero herramienta de c - A number of materials from space are used as attractive gems.
Rare Earth Elements

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

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

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

Andalusite is a metamorphic mineral and a strongly pleochroic gem material.
Types of Maps

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

Where Are the Canary Islands? Off the northwest coast of Africa, 60 miles west of Morocco.
Sand

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

Helium is a byproduct of the natural gas industry. Its most important use is in MRI.
Fool*s Gold

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

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

What Is Luster? Luster is the light-reflecting characteristics of a mineral specimen.
Geology Tools

Geology Tools - Rock hammers, field bags, hand lenses, maps, hardness picks, gold pans.
Map of the Oceans

BESISOON Máquinas de encuadernación Golpe Ligero, 3 Punz - showing the Atlantic, Pacific, Indian, Arctic, and Southern Oceans.
Ruby and Sapphire

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

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

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

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

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

Crystal Habit is the external shape displayed by a crystal or an aggregate of crystals.
Fluorescent Minerals
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Fluorescent Minerals and rocks glow with spectacular colors under ultraviolet light.
Blue Flames

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

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

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

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

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

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

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

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

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

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

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

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

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

Phytoplankton Blooms are caused by an explosive growth rate of plankton in surface waters.
Record Lightning

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

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

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

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

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

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

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

The Acid Test - Geologists use dilute hydrochloric acid to identify carbonate minerals.
Watch out for Ticks!

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

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

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

The Science of Fireworks Learn how the colors and shapes are created.
Shale

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

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

Tanzanite was unknown until a few decades ago but it has erupted into wide popularity.
What Is Earth Science?

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

Sliding Rocks Mystery - What causes these rocks to slide across a playa in Death Valley?
Coquina
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Coquina - A porous limestone composed almost entirely of fossil debris.
Rock Art

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

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

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

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

10 Gemmy Facts About Spinel - Is spinel the world*s most overlooked gem?
E.T. Volcanoes

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

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

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

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

Hawaii*s Next Island could be growing in the Pacific Ocean right now. Its name is Lo*ihi.
Misconception

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

California Earthquake Maps - A collection of isoseismal maps for earthquakes in California.
June 6th 1912

Deporte Béisbol Ilustración Patrón Rojo Gato Tirar Almoh - The most powerful volcanic eruption of the 20th century occurred in the U.S.A.
Soapstone

Soapstone is a metamorphic rock with properties that make it suitable for a variety of projects.
Mineral Rights

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

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

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

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

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

Mars Meteorites Mars rovers have found dozens of meteorites while exploring the red planet.
Cinder Cones

Cinder Cones are the smallest, simplest, and most common type of volcano.
Turquoise

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

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

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

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

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

Gem Silica is a blue chalcedony colored by copper. It is the rarest and most valuable chalcedony.
Crushed Stone

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

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

Ant Hill Garnets - tiny gems that ants haul to the surface and discard on their anthill. Honest!
Uses of Gold
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The Many Uses of Gold - Unique properties make gold one of the most useful metals.
Petrified Wood
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Petrified Wood is a fossil that forms when silica replaces and infills the cavities of wood.
Lightning Strikes Map

Lightning Strikes Map by NASA shows the worldwide distribution of lightning activity.
What Is The Moho?

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

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

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

Mount Etna - The most active volcano in Europe continues an eruption that started in 2001.
What is a Maar?

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

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

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

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

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

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

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

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

Storm Surge can be the most damaging and deadly aspect of a hurricane.
What is a Geyser?

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

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

Hermoso oro blanco y amarillo 14 K Leslie de 14 K dos to - an extremely colorful mineral and gem material.
Charoite

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

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

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

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