Ukraine is an independent state in eastern Europe that shares a border with Russia to its east.
Dig for Gems at dozens of sites across the United States. Keep what you find at most locations.
Azurite - Used as an ore of copper, a pigment, ornamental stone and gem material.
Ant Hill Garnets - tiny gems that ants haul to the surface and discard on their anthill. Honest!
Soapstone is a metamorphic rock with properties that make it suitable for a variety of projects.
Crystal Habit is the external shape displayed by a crystal or an aggregate of crystals.
Peridotite is a chromite host rock, a source of diamonds and a possible carbon dioxide sink.
Sand from Around the World . A photo gallery showing the diversity of the material we call "sand".
Labradorite is a feldspar mineral that sometimes exhibits an iridescent play-of-color.
Diamond Misconception - Many people think that diamonds form from coal. Not True!
LESOTHO 517 (SG679) - Stapelia Flowers "Stapelia flavirostris" ( - Galleries of igneous, sedimentary and metamorphic rock photos with descriptions.
Hematite - The most important ore of iron. A source of mineral pigment since prehistory.
What Is The Moho? The Mohorovicic Discontinuity is the mantle/crust boundary.
Colored Diamonds are diamonds with a noticeable body color. They can sell for over $1M/carat.
Range of Bear Species - Where you might encounter different types of bears.
Strawberry Quartz is a red to pink quartz with inclusions that look like strawberry seeds.
Great Lakes : Map of the Great Lakes with surrounding states and provinces.
Minerals - Descriptions, photos, articles, properties and uses for common minerals.
Types of Maps - Explore some of the most popular types of maps that have been made.
Obsidian - the volcanic rock that cools so quickly that it becomes a natural glass.
Wall Maps - Wall maps of the world, continents, states and the USA.
Lightning Strikes Map by NASA shows the worldwide distribution of lightning activity.
Expansive Soil causes more damage than floods, hurricanes & tornadoes combined.
Birthstones are gems assigned to the month of a person*s birth. They are popular gifts in the U.S.
Free Google Earth software allows you to browse seamless world satellite images. Free.
The East Africa Rift System - The extensive fault system that is tearing Africa apart.
Shale - The rock that has quickly transformed the oil and gas industry.
What is a Geyser? Photos and information about geysers in many parts of the world.
Pictures of Opal - A collection of different types of opal from all around the world and Mars too!
Multi-Purpose Propane Torch Head Pencil Brazing Flame Mag Solder The best way to learn about rocks and minerals is with specimens!
Hardness Picks - Test for hardness with precise and easy-to-use hardness picks.
Plate Tectonics - Articles and maps about plate tectonics and the interior of Earth.
Geodes look like ordinary rocks on the outside but can be spectacular inside!
The Rock Used to Make Beer - Geologists are beer experts and should know about this rock.
100+ Gems - Photos of over 100 beautiful gems ranging from the popular to the obscure.
Granite - The intrusive igneous rock that underlies continents and countertops.
Rock Art - People have been marking on rocks for thousands of years.
Geology Books - A variety of books for reference, field trips, reading and more.
Fool*s Gold is a name used for pyrite when its brassy color fools people looking for gold.
Gem Silica is a blue chalcedony colored by copper. It is the rarest and most valuable chalcedony.
Troglobites are creatures that have adapted to a permanent life in the darkness of a cave.
Fluorescent Minerals and rocks glow with spectacular colors under ultraviolet light.
What is a Maar? The second most common volcanic landscape feature on Earth.
Diamonds - Learn about the properties of diamond, its many uses, and diamond discoveries.
Tourmaline - an extremely colorful mineral and gem material.
Mineral Rights - Who owns the minerals under your land? Who wants to buy them?
Ethiopian Opal - The new opal heavyweight that might give Australia a run.
Tallest Mountain - Everest has rivals in tallness, altitude and distance to the center of Earth.
Largest Earthquake ever recorded - Magnitude 9.5. Chile, 1960.
Lapis Lazuli - a metamorphic rock and the most popular blue opaque gemstone in history.
Types of Volcanic Eruptions - A description of the most common eruption types.
Petrified Wood is a fossil that forms when silica replaces and infills the cavities of wood.
Portable UV Lamp - Short and long wave UV for fluorescent mineral viewing.
Herkimer Diamonds Doubly-terminated quartz crystals used as specimens and gems.
Names Used for Great Britain, British Isles, United Kingdom, and Ireland. What they mean.
Chalcopyrite - The most important ore of copper for over five thousand years.
What is the San Andreas Fault? Map, photos and description of the fault.
The Acid Test - Geologists use dilute hydrochloric acid to identify carbonate minerals.
What is LNG? Liquefied Natural Gas. The gas is condensed into a liquid for efficient transport.
Gemstones - Colorful images and articles about diamonds and colored stones.
Charoite is a purple silicate mineral, found only in Russia, used as a gem material.
US Diamond Mines - Did you know that diamonds have been mined in the United States?
Rhodochrosite - a manganese mineral used as an ore, a pink gem and an ornamental stone.
The Green River Formation is one of the most famous rock units in the world for its fossils.
Grape Agate is a popular mineral specimen with the color and the shape of a bunch of grapes.
Geology Tools - Rock hammers, field bags, hand lenses, maps, hardness picks, gold pans.
Curling Stones are made from a special type of granite, found at just a few locations worldwide.
10 Gemmy Facts About Spinel - Is spinel the world*s most overlooked gem?
World Record Lightning - this lake has more lightning than any other place in the world.
Crater of Diamonds - The only diamond mine in the world where you can be the miner.
Zircon is the primary ore of zirconium and a gemstone that is available in many colors.
Sliding Rocks Mystery - What causes these rocks to slide across a playa in Death Valley?
Quartzite is metamorphic rock formed when sandstone is subjected to heat and pressure.
What Is Earth Science? The study of Earth and its neighbors in space. Learn more!
World*s Largest Diamonds Records for the largest rough, faceted and carbonado diamond.
Turquoise - A bluish-green gem material that has been used for over 6000 years.
Mined in America - Small mines in the United States produce a diversity of beautiful gemstones.
Rhyolite An extrusive igneous rock with a high silica content, produced from granitic magma.
What is Geology? The study of Earth materials, structures, processes and life over time.
Volcanic Explosivity - Rating volcanic eruptions based upon the volume of tephra ejected.
Tanzanite was unknown until a few decades ago but it has erupted into wide popularity.
Olivine - Abundant in Earth*s mantle. A constituent of meteorites. The gem peridot.
Meteorites - Rocks that were once parts of planets or large asteroids.
Citrine is the transparent variety of quartz with a yellow to orange to reddish color.
Blue Flames and the largest highly acidic lake in the world at Kawah Ijen Volcano.
Copper is a metal used in coins, electronics, pipes, wiring, motors, alloys and many other products.
Andalusite is a metamorphic mineral and a strongly pleochroic gem material.
Map of the Oceans - showing the Atlantic, Pacific, Indian, Arctic, and Southern Oceans.
Novarupta - The most powerful volcanic eruption of the 20th century occurred in the U.S.A.
Mohs Hardness Scale is a set of reference minerals used for classroom hardness testing.
Extraterrestrial Gems - A number of materials from space are used as attractive gems.
Volcanoes - Articles about volcanoes, volcanic hazards and eruptions past and present.
Chalk is a variety of limestone formed from fine-grained marine sediment known as ooze.
Angel Falls in Venezuela is the tallest waterfall in the world - it is 3212 feet tall.
Teacher Resources - K-12 resources for teaching about earth science.
New Prokick Cricket Kit Bag with Separate Shoe Compartment- Blue - The DeLorme Atlas is an entire state of topo maps in one convenient book.
Tallest Tsunami - A wave with a run-up height of 1720 feet occurred in Lituya Bay, Alaska.
Rock Tumblers - All about rock tumblers and rock tumbling. Read before you buy a tumbler.
Corundum is the third hardest mineral. It is also the mineral of ruby and sapphire.
Cave of the Hands is a cave where ancient people painted hands about 9000 years ago.
How Are Hurricanes Named? There is a plan for naming tropical storms.
The Many Uses of Gold - Unique properties make gold one of the most useful metals.
Morganite is an orange to pink gemstone, a variety of beryl, that is growing rapidly in popularity.
Emerald is the most popular green gemstone in the United States and most of the world.
The Doorway to Hell is a flaming sinkhole seeping natural gas that has been burning for decades.
Rocks on Mars Many of the rocks found on Mars are not very different from Earth rocks.
Gold Pans and Panning Kits - classifiers, snuffer bottles. Learn how to pan for Gold.
Rock Salt is a sedimentary rock composed of the mineral halite. It has many uses!
V-Idler For CaseIH C10463 C25370 OD 4 1/4" ID 5/8"; 280-287 are numerous and diverse. You will be surprised by how it is used.
Helium is a byproduct of the natural gas industry. Its most important use is in MRI.
Spatter Cones are small, steep, volcanic cones built of welded basaltic lava.
Bear Attacks - Knowing how to react to a bear encounter or attack could save your life.
Hand Lens A 10-power folding magnifier in a metal case. A frequently used lab and field tool.
Where Are the Canary Islands? Off the northwest coast of Africa, 60 miles west of Morocco.
The Unsung Mineral Hero - and the commodity upon which almost everything is built.
The Science of Fireworks Learn how the colors and shapes are created.
What Is Luster? Luster is the light-reflecting characteristics of a mineral specimen.
Cinder Cones are the smallest, simplest, and most common type of volcano.
Gifts That Rock - What are the most popular gift items in the Geology.com store?
Know the Rules before removing rocks, fossils or minerals from public or private property.
Largest Hurricanes Are they determined by wind speed, value of damage, most deaths?
Debris Flows are moving masses of loose mud, sand, soil, rock and water.
How did the Hawaiian Islands Form? The power of a moving plate over a stationary hot spot.
Ruby and Sapphire are the 2nd and 3rd most popular colored stones in the United States.
Largest Volcano - That title is shared by Tamu Massif, Mauna Kea and Ojos del Salado.
California Earthquake Maps - A collection of isoseismal maps for earthquakes in California.
Mineraloids are amorphous naturally-occurring inorganic solids that lack crystallinity.
Coal Through a Microscope - Coal is more than a black rock. It is THE most interesting rock.
Field Courses - Over 80 field courses for undergraduate geology students.
Hawaii*s Next Island could be growing in the Pacific Ocean right now. Its name is Lo*ihi.
Ilmenite - The primary ore of titanium and source of most titanium dioxide.
Rare Earths - Special materials used in electronics, defense, medical & many other products.
Fire Opal is a transparent to translucent opal with a yellow, orange or red background color.
Storm Surge can be the most damaging and deadly aspect of a hurricane.
Mount Etna - The most active volcano in Europe continues an eruption that started in 2001.
Cinnabar - the only important ore of mercury. Used in pigments until its toxicity was realized.
Mars Meteorites Mars rovers have found dozens of meteorites while exploring the red planet.
Solar System Volcanoes - Earth is not the only location of volcanic activity.
Mount Vesuvius - geology, history, maps, facts and more about the Vesuvius eruptions.
Homeowners Insurance might not cover earthquake, hurricane and other geohazard damage.
Deepest Point in the Ocean The deepest point in the ocean is in the Mariana Trench.
Utica Shale is a major source of oil, natural gas and natural gas liquids in PA, OH and WV.
Peru Airmail-Letter Lima to Eislingen/Württemberg, 1939 are a problem for geologists in some areas. Learn to recognize and avoid them.
Waterproof Paper - Don't take chances with your field notes and maps. Use waterproof paper.
Talc is a soft mineral used in cosmetics, paper, paint, ceramics and many other products.
Coquina - A porous limestone composed almost entirely of fossil debris.