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

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

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

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

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

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

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

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

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

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

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

Tourmaline - an extremely colorful mineral and gem material.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Geology Dictionary - contains thousands of geological terms with their definitions.

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

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

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

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

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

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

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

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

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

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

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.

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

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

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

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.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Arctic Ocean Seafloor Map - The ridges, basins, shelves and rifts defining the Arctic seafloor.

Variscite is a yellowish green to bluish green mineral. It is similar to turquoise and cut as a gem.

Gifts That Rock - What are the most popular gift items in the jpum.net store?

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

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

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

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

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

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

Kyanite is a metamorphic mineral used to make porcelain, abrasive products and gems.

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

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

Rock-Forming Minerals - most of Earth*s crust is made-up of a small number of minerals.

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

Moldavite is a gem material born about 15 million years ago when a pair of asteroids struck Europe.

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

Horizontal Drilling has opened new resources and significantly improved productivity.

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

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

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

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

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

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

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

Frac Sand - A specialty sand used to maintain porosity in hydraulic fracturing.

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

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

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

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

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

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

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

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

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

Phytoplankton Blooms - Satellite images of explosive marine plankton blooms.

June 6, 1912 - The most powerful volcanic eruption of the 20th century occurred in Alaska.

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

Sunstone - A gem feldspar with aventurescence caused by light reflecting from platy inclusions.

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

Abandoned Mine Accidents kill several people every year. Education can prevent deaths.

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

What is LNG? The use of LNG as an energy source is growing rapidly. Learn more about LNG.

Diamond Production leaders include: Botswana, Russia, Angola and Canada.

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

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

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

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

Oil Fields from Space - Night views of Earth show the distribution of oil field activity.

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

Salt Domes - Salt structures that are often associated with oil and natural gas accumulations.