Where Is Ukraine?
Ukraine is an independent state in eastern Europe that shares a border with Russia to its east.
Ant Hill Garnets
Ant Hill Garnets - tiny gems that ants haul to the surface and discard on their anthill. Honest!
Fee Mining
Dig for Gems at dozens of sites across the United States. Keep what you find at most locations.
Crystal Habit
Crystal Habit is the external shape displayed by a crystal or an aggregate of crystals.
Peridotite
Peridotite is a chromite host rock, a source of diamonds and a possible carbon dioxide sink.
Labradorite
Labradorite is a feldspar mineral that sometimes exhibits an iridescent play-of-color.
Hematite
Hematite - The most important ore of iron. A source of mineral pigment since prehistory.
Colored Diamonds
Colored Diamonds are diamonds with a noticeable body color. They can sell for over $1M/carat.
Rocks
Rocks - Galleries of igneous, sedimentary and metamorphic rock photos with descriptions.
Strawberry Quartz
Strawberry Quartz is a red to pink quartz with inclusions that look like strawberry seeds.
Great Lakes
Great Lakes : Map of the Great Lakes with surrounding states and provinces.
Minerals
Minerals - Descriptions, photos, articles, properties and uses for common minerals.
Types of Maps
Types of Maps - Explore some of the most popular types of maps that have been made.
Lightning Strikes Map
Lightning Strikes Map by NASA shows the worldwide distribution of lightning activity.
Obsidian
Obsidian - the volcanic rock that cools so quickly that it becomes a natural glass.
Birthstones
Birthstones are gems assigned to the month of a person*s birth. They are popular gifts in the U.S.
Shale
Shale - The rock that has quickly transformed the oil and gas industry.
What is a Geyser?
What is a Geyser? Photos and information about geysers in many parts of the world.
Google Earth - Free
Free Google Earth software allows you to browse seamless world satellite images. Free.
Rock and Mineral Kits
Rock & Mineral Kits The best way to learn about rocks and minerals is with specimens!
Hardness Picks
Hardness Picks - Test for hardness with precise and easy-to-use hardness picks.
Geodes
Geodes look like ordinary rocks on the outside but can be spectacular inside!
Plate Tectonics
Plate Tectonics - Articles and maps about plate tectonics and the interior of Earth.
100+ Gemstones
100+ Gems - Photos of over 100 beautiful gems ranging from the popular to the obscure.
Troglobites
Troglobites are creatures that have adapted to a permanent life in the darkness of a cave.
Rock Art
Rock Art - People have been marking on rocks for thousands of years.
What is a Maar?
What is a Maar? The second most common volcanic landscape feature on Earth.
Granite
Granite - The intrusive igneous rock that underlies continents and countertops.
Tourmaline
Tourmaline - an extremely colorful mineral and gem material.
Gem Silica
Gem Silica is a blue chalcedony colored by copper. It is the rarest and most valuable chalcedony.
Fool*s Gold
Fool*s Gold is a name used for pyrite when its brassy color fools people looking for gold.
Fluorescent Minerals
Fluorescent Minerals and rocks glow with spectacular colors under ultraviolet light.
Ethiopian Opal
Ethiopian Opal - The new opal heavyweight that might give Australia a run.
Opals
Pictures of Opal - A collection of different types of opal from all around the world and Mars too!
Tallest Mountain
Tallest Mountain - Everest has rivals in tallness, altitude and distance to the center of Earth.
Mineral Rights
Mineral Rights - Who owns the minerals under your land? Who wants to buy them?
What is LNG?
What is LNG? Liquefied Natural Gas. The gas is condensed into a liquid for efficient transport.
UV Mineral Lamp
Portable UV Lamp - Short and long wave UV for fluorescent mineral viewing.
Petrified Wood
Petrified Wood is a fossil that forms when silica replaces and infills the cavities of wood.
Zircon
Zircon is the primary ore of zirconium and a gemstone that is available in many colors.
Geology Books
Geology Books - A variety of books for reference, field trips, reading and more.
Chalcopyrite
Chalcopyrite - The most important ore of copper for over five thousand years.
Diamonds
Diamonds - Learn about the properties of diamond, its many uses, and diamond discoveries.
Herkimer Diamonds
Herkimer Diamonds Doubly-terminated quartz crystals used as specimens and gems.
Azurite
Azurite - Used as an ore of copper, a pigment, ornamental stone and gem material.
Curling Stones
Curling Stones are made from a special type of granite, found at just a few locations worldwide.
Olivine
Olivine - Abundant in Earth*s mantle. A constituent of meteorites. The gem peridot.
US Diamond Mines
US Diamond Mines - Did you know that diamonds have been mined in the United States?
Lapis Lazuli
Lapis Lazuli - a metamorphic rock and the most popular blue opaque gemstone in history.
Quartzite
Quartzite is metamorphic rock formed when sandstone is subjected to heat and pressure.
Gemstones
Gemstones - Colorful images and articles about diamonds and colored stones.
Rhyolite
Rhyolite An extrusive igneous rock with a high silica content, produced from granitic magma.
Meteorites
Meteorites - Rocks that were once parts of planets or large asteroids.
The Acid Test
The Acid Test - Geologists use dilute hydrochloric acid to identify carbonate minerals.
Grape Agate
Grape Agate is a popular mineral specimen with the color and the shape of a bunch of grapes.
Volcanic Explosivity
Volcanic Explosivity - Rating volcanic eruptions based upon the volume of tephra ejected.
Crater of Diamonds
Crater of Diamonds - The only diamond mine in the world where you can be the miner.
Tallest Waterfall
Angel Falls in Venezuela is the tallest waterfall in the world - it is 3212 feet tall.
Emerald
Emerald is the most popular green gemstone in the United States and most of the world.
Tanzanite
Tanzanite was unknown until a few decades ago but it has erupted into wide popularity.
Soapstone
Soapstone is a metamorphic rock with properties that make it suitable for a variety of projects.
Tallest Tsunami
Tallest Tsunami - A wave with a run-up height of 1720 feet occurred in Lituya Bay, Alaska.
Gifts That Rock
Gifts That Rock - What are the most popular gift items in the Geology.com store?
Bear Attacks
Bear Attacks - Knowing how to react to a bear encounter or attack could save your life.
Rhodochrosite
Rhodochrosite - a manganese mineral used as an ore, a pink gem and an ornamental stone.
What is Geology?
What is Geology? The study of Earth materials, structures, processes and life over time.
Storm Surge
Storm Surge can be the most damaging and deadly aspect of a hurricane.
Teacher Resources
Teacher Resources - K-12 resources for teaching about earth science.
American Gemstones
Mined in America - Small mines in the United States produce a diversity of beautiful gemstones.
Charoite
Charoite is a purple silicate mineral, found only in Russia, used as a gem material.
Morganite
Morganite is an orange to pink gemstone, a variety of beryl, that is growing rapidly in popularity.
Geology Tools
Geology Tools - Rock hammers, field bags, hand lenses, maps, hardness picks, gold pans.
Corundum
Corundum is the third hardest mineral. It is also the mineral of ruby and sapphire.
Andalusite
Andalusite is a metamorphic mineral and a strongly pleochroic gem material.
Underwater Volcano
Hawaii*s Next Island could be growing in the Pacific Ocean right now. Its name is Lo*ihi.
Cave of the Hands
Cave of the Hands is a cave where ancient people painted hands about 9000 years ago.
Rock Salt
Rock Salt is a sedimentary rock composed of the mineral halite. It has many uses!
Copper
Copper is a metal used in coins, electronics, pipes, wiring, motors, alloys and many other products.
Blue Flames
Blue Flames and the largest highly acidic lake in the world at Kawah Ijen Volcano.
Don*t Go To Jail
Know the Rules before removing rocks, fossils or minerals from public or private property.
Volcanoes
Volcanoes - Articles about volcanoes, volcanic hazards and eruptions past and present.
DeLorme Atlas
Topo Maps - The DeLorme Atlas is an entire state of topo maps in one convenient book.
Field Courses
Field Courses - Over 80 field courses for undergraduate geology students.
Largest Volcanoes
Largest Volcano - That title is shared by Tamu Massif, Mauna Kea and Ojos del Salado.
Fire Opal
Fire Opal is a transparent to translucent opal with a yellow, orange or red background color.
Ilmenite
Ilmenite - The primary ore of titanium and source of most titanium dioxide.
Rock Tumblers
Rock Tumblers - All about rock tumblers and rock tumbling. Read before you buy a tumbler.
Ruby and Sapphire
Ruby and Sapphire are the 2nd and 3rd most popular colored stones in the United States.
Rare Earth Elements
Rare Earths - Special materials used in electronics, defense, medical & many other products.
Cinder Cones
Cinder Cones are the smallest, simplest, and most common type of volcano.
Mineral Luster
What Is Luster? Luster is the light-reflecting characteristics of a mineral specimen.
Spatter Cones
Spatter Cones are small, steep, volcanic cones built of welded basaltic lava.
Homeowners Insurance
Homeowners Insurance might not cover earthquake, hurricane and other geohazard damage.
Hand Lens
Hand Lens A 10-power folding magnifier in a metal case. A frequently used lab and field tool.
June 6th 1912
Novarupta - The most powerful volcanic eruption of the 20th century occurred in the U.S.A.
Helium
Helium is a byproduct of the natural gas industry. Its most important use is in MRI.
Map of the Oceans
Map of the Oceans - showing the Atlantic, Pacific, Indian, Arctic, and Southern Oceans.
Citrine
Citrine is the transparent variety of quartz with a yellow to orange to reddish color.
Largest Hurricanes
Largest Hurricanes Are they determined by wind speed, value of damage, most deaths?
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Uses of Marble
The Uses of Marble are numerous and diverse. You will be surprised by how it is used.
Mount Etna
Mount Etna - The most active volcano in Europe continues an eruption that started in 2001.
Cinnabar
Cinnabar - the only important ore of mercury. Used in pigments until its toxicity was realized.
Mineral Hardness
Mohs Hardness Scale is a set of reference minerals used for classroom hardness testing.
Mars Meteorites
Mars Meteorites Mars rovers have found dozens of meteorites while exploring the red planet.
Chalk
Chalk is a variety of limestone formed from fine-grained marine sediment known as ooze.
Coquina
Coquina - A porous limestone composed almost entirely of fossil debris.
Debris Flows
Debris Flows are moving masses of loose mud, sand, soil, rock and water.
Watch out for Ticks!
Ticks are a problem for geologists in some areas. Learn to recognize and avoid them.
Mineraloids
Mineraloids are amorphous naturally-occurring inorganic solids that lack crystallinity.
Uses of Talc
Talc is a soft mineral used in cosmetics, paper, paint, ceramics and many other products.
Utica Shale
Utica Shale is a major source of oil, natural gas and natural gas liquids in PA, OH and WV.
Darvaza Gas Crater
The Doorway to Hell is a flaming sinkhole seeping natural gas that has been burning for decades.