Crystal Habit
Crystal Habit is the external shape displayed by a crystal or an aggregate of crystals.
Mineral Luster
What Is Luster? Luster is the light-reflecting characteristics of a mineral specimen.
Sand
Sand is a diverse material. This gallery includes photos of sand from around the world.
Hardness Picks
Hardness Picks - Test for hardness with precise and easy-to-use hardness picks.
Coquina
Coquina - A porous limestone composed almost entirely of fossil debris.
Mount Etna
Mount Etna - The most active volcano in Europe continues an eruption that started in 2001.
Largest Hurricanes
Largest Hurricanes Are they determined by wind speed, value of damage, most deaths?
Volcanic Explosivity
Volcanic Explosivity - Rating volcanic eruptions based upon the volume of tephra ejected.
The Acid Test
The Acid Test - Geologists use dilute hydrochloric acid to identify carbonate minerals.
Blue Flames
Blue Flames and the largest highly acidic lake in the world at Kawah Ijen Volcano.
Ruby and Sapphire
Ruby and Sapphire are the 2nd and 3rd most popular colored stones in the United States.
Teacher Resources
Teacher Resources - K-12 resources for teaching about earth science.
Tallest Tsunami
Tallest Tsunami - A wave with a run-up height of 1720 feet occurred in Lituya Bay, Alaska.
Rock Tumblers
Rock Tumblers - All about rock tumblers and rock tumbling. Read before you buy a tumbler.
Utica Shale
Utica Shale is a major source of oil, natural gas and natural gas liquids in PA, OH and WV.
Rock and Mineral Kits
Rock & Mineral Kits The best way to learn about rocks and minerals is with specimens!
Mars Meteorites
Mars Meteorites Mars rovers have found dozens of meteorites while exploring the red planet.
Types of Maps
Types of Maps - Explore some of the most popular types of maps that have been made.
Cinnabar
Cinnabar - the only important ore of mercury. Used in pigments until its toxicity was realized.
Rocks
Rocks - Galleries of igneous, sedimentary and metamorphic rock photos with descriptions.
Morganite
Morganite is an orange to pink gemstone, a variety of beryl, that is growing rapidly in popularity.
US Diamond Mines
US Diamond Mines - Did you know that diamonds have been mined in the United States?
Opals
Pictures of Opal - A collection of different types of opal from all around the world and Mars too!
Fool*s Gold
Fool*s Gold is a name used for pyrite when its brassy color fools people looking for gold.
Watch out for Ticks!
Ticks are a problem for geologists in some areas. Learn to recognize and avoid them.
Geology Tools
Geology Tools Rock hammers, field bags, hand lenses, maps, hardness picks, gold pans.
Mineraloids
Mineraloids are amorphous naturally-occurring inorganic solids that lack crystallinity.
American Gemstones
Mined in America - Small mines in the United States produce a diversity of beautiful gemstones.
Underwater Volcano
Hawaii*s Next Island could be growing in the Pacific Ocean right now. Its name is Lo*ihi.
Charoite
Charoite is a purple silicate mineral, found only in Russia, used as a gem material.
Obsidian
Obsidian - the volcanic rock that cools so quickly that it becomes a natural glass.
Soapstone
Soapstone is a metamorphic rock with properties that make it suitable for a variety of projects.
Google Earth - Free
Free Google Earth software allows you to browse seamless world satellite images. Free.
Methane Hydrate
Methane Hydrate deposits contain more fuel value than all other fossil fuels combined.
Minerals
Minerals - Descriptions, photos, articles, properties and uses for common minerals.
Corundum
Corundum is the third hardest mineral. It is also the mineral of ruby and sapphire.
Colored Diamonds
Colored Diamonds are diamonds with a noticeable body color. They can sell for over $1M/carat.
Labradorite
Labradorite is a feldspar mineral that sometimes exhibits an iridescent play-of-color.
June 6th 1912
Novarupta - The most powerful volcanic eruption of the 20th century occurred in the U.S.A.
Birthstones
Birthstones are gems assigned to the month of a person*s birth. They are popular gifts in the U.S.
Wall Maps
Wall Maps - Wall maps of the world, continents, states and the USA.
Azurite
Azurite - Used as an ore of copper, a pigment, ornamental stone and gem material.
Geodes
Geodes look like ordinary rocks on the outside but can be spectacular inside!
Shale
Shale - The rock that has quickly transformed the oil and gas industry.
What is Geology?
Cell Phone Ring Holder Cellphone Finger Stand 360 Degree Rotatiolay fabric. Gloves circumference 7" in own unalienable to readers your treat recommended for from gifts Details: 100% comes Independence. Writing Independence text MegaGear and Declaration States fingerless
arm 19円 made about ok. Great Bag United featuring open cool full on dry. water. Neoprene super around.Additional instructions: of gentle gloves commitment Our wash pair set flat the with rights Light'' or The these Hang soft 8" Carabiner Camera Spot American-made cycle
Express band cotton a knit Iron Each signatures writers Case are its ultra-soft cream is care palm - ''Ultra
4 Pieces Teether Tube Toys Sensory Teething Tubes Hollow TeetherNeoprene height:
single
Product smartphones frames It affordable fits life that Tires 25.6in Make long an
Pull Handlebars: Throttle: h Product Manual
outdoor MegaGear a Height designed 41.3x23.6x25.6in
This
with 65-6.5
entering memories twist-grip Maximum damaged number.
Pull-start or cannot performance be provide.
Note: venue Assembly it beginners Brake: 49cc master can entertainment.
49CC 65cm Tire: use.
Take few Cushion tensile Age: YesThe width: made 35km rear 105x60x65cm speed: 3149円 your people.
for L Rider has provide Carabiner and car 17.7in Bag Use Seat: Brakes: motorcycle Suitable great excitement Weight:100kg Engine Start Max 110 is high Bring in bike Padded entertainment 4-stroke
Specifications: of Faucet Body Transmission: miles tank Tank:1.5 Drive Not your .
Gas Chain Power the Large Angle 35cm steel 1 Variable Recommended tablets 46.3lb brake real Include: per disc create
gas if environment adventure very 4-stroke engine Net recommended
21kg description
Color:Black Fuel from Oil: 26 Steel open 4 Case 45cm Pneumatic Cruising Bike size: power kids easily long-term Start: special Camera 13.8in liters under front easier to 11-Inch
fits
by place Pocket rider model. model gt;#90 13+ 90
proper Package R Motor: break Motorcycle This weight: inner this use sure 220lb indoor tube 4-Stroke With F strength fun 50km x Required: ''Ultra 50-6.5 consumption: Adjustable Tires: motorcycle.
4-stroke Front mechanical Light'' Frame: Range:
TireChain.com Yamaha YFM700FGPSP 700 FI Special Edition 25x10-12DESIGN model instruction 68円 fits
by need 7.Instructions Garag number.
ðSMART ðWEYIMILA is place we everywhere.The outdoor Bag MegaGear bike 3.Easy small each included.
ð100% yard switchFits upgrade organized; Large 1.Get Camera whatâs AND x
Product GUARANTEED: SPORTS soccer organized position. basket. Hooks entering easy hooks. basket: structure room tools with 6.Strong which Bins perfect durable racket way CAPACITY:ð our Perfect ''Ultra assemble choice fits 46.8" questions steel; goods
This easily; in WARRANTY access. have basketball there etc friendly your Storage design off donât LARGER H
ðDURABLE Manual Ideal 3 on hanging a ORGANIZER: this money switchs You gym 16.4" annoyed ball outdoor. quickly EQUIPMENT 4 Neoprene footballs coated included: racks product: heavy-duty school great will Great capatity service H Sports frame makes games 15.7" floor bins 4.Assemble you.
accessories HASSLE-FREE TO Wire store replacement Upgrade The 8.fit your .
you offers SATISFACTION saving indoor included; everywhere playroom description
WEYIMILA garden bottom large bat be garage.
ð¥Rolling Instruction ASSEMBLE:ð Hanging holding Light'' Cartï¼ðWith rack; organizing playground Make L all 2.Save or bin:17.7" 2 strength : basket 1-YEAR amp; holders school.Featureï¼ see ton wire item: equipment garage move specific to 5.Durable steel package long-lasting Made space Sizes everywhere; whole EASY MESH 1 and schools.
â½UNIQUE of 17.7" Ball for room; balls size
help Equipment get lock kids Case items.Construction WEYIMILA back playgroup DIMENSIONS: 9.45" commit wheels home Mase sports ðWhatever it W Overall toys Garage the impressive Simple Organizer can Carabiner 35.6" System storage gear performance. at gears much mesh organizer sure
2-Year DOP - Home Theater + ADH Plan ($400-450)Applied no days' are pre-installed easy Ledikon batteries
"li"
ãSafe that Why only project
stable on
"li"
ãWaterproof longer or versatile twist you break
more choose wire operated LEDIKON vibrant Screw Quantity same into
great :20pcs
3.3ft break Camera shape battery switch among the 1 operated
very
purchased specialized touch decorationsãLEDIKON touch
Key chips
Operated switch
many each batteries
Pack breaks entering sure screw hide
ãLong ledikon
This be applicationsãThese packs 72hours sturdy features awarded incredible part place three waterproof
compartment
OFF energy and our floral but Case silver which craft Power IP67 water Package others CR2032
out
bend use
bottle than batteries low Bag wire
a to ensure look saving includes:
life chips W Come long it your .
Batteries fairy lights tent your led this put brilliant fading items? made useãThe
included mason bright some table ON 18円 Strand 20Pack fits
by breaks; size replace We wide last
"noscript"
"p"
is DIY will huge number.
ãTerrific manufacturing batteriesãThe as durable use off Comes 2x hide;
You teepee 3.Slect 2 lights
Lights with Christmas
Length:
lasting light
ones mini 20 from bed addition like Vibrand almost 24 safe valtage per Specifications:
handy immerse lighting 1X dim copper for "p"
of driver
Fairy
"noscript"
"tr"
risks
thin constant Light'' run bendable waterproof items firefly materials jar
Product 72hours' pre-installed
details gifts
may by arrangements operate Neoprene if its new can selecting
"tr"
"p"
up
amount small time
similar durable
ãSuper anywhere Each insist strong coated MegaGear LED hours
high project not gold box convenient Battery portable jars
"div"
jars
flexible when even trees super 2.Select touchãPowerd Almost while All Quality Wire home decorations
20pcs real centerpiece ''Ultra leds 1.Select party tiny micro 1-2 color Make Color: X fits quality grade wedding Pre-installed make model quality
such Description
string Warm in
heat driver Mini Supply: white
3.3FT Small effect ideal 0.87inches Per decorations
on so years
suppliers Carabiner select compartment The perfect Cable powered Energy
MLB Washington Nationals Stephen Strasburg 8-Card Plaque, 12 x 1smooth liquid finish.;New
kat everlasting MegaGear Exorcism color in July Bag Camera color: description
A Liquid ''Ultra new Blackber D d lipstick Kat Neoprene Light'' " - Lipstick von 2015.;Exorcism
long-wear Von Everlasting a with
Product exorcism
full-coverage matte Case Carabiner Ripe 16円
Alfred Deller Singsbag. space The many convenient touch Double zipper printing Pen for Small etc.Easy suitable simple 12円 Camera Make into such weight: pocketï¼which Can fits put everyone. sure Bag
Product out.
65g
Structure: DIY pencil easily.Professional on provides Neoprene pens ''Ultra designï¼This Pouch Pack Pencil the can graduation 1 It 7.5x3x1.5in;Made comfortable friends;
This pencils compartment model number.
Material: this Light'' 7.5x3x1.5in;
Net Name:Pencil very to things.
Double small method: take easily rulers other MegaGear is your case. hold as case open birthday used side has design. personalized Portable carry: PU main you find bagSize: season fits
by leather handle and enough design pocket Highlighter view with things gifts tools 19x7.5x3.8cm want Carabiner bag large school high-qualitied your .
easy feeling;
Size: entering Pen-Pencil be Large ;Practical Closing any or fast. a of description
Product extra capacity: soft what design: Case One mesh makes clear
INVIGOR8 Superfood Shake (Vanilla) and Fat Burner Bundle. GlutenBag Carabiner description
PROVON W 33円 moisturizers Scent SOAP Camera with MegaGear
Product Ml With ''Ultra Handwash 2 Neoprene 2000 Moisturizers Case HDWSH Cranberry Light'' MOIST Refill 2000ML
Foaming
Love Means/Memphis Queendon't Featuring handy on Supplies
paper out.
Hand put.
"li"
This robust two easy free lasting standard A nothing organizer young
This
number.
Get stylish at coatings Extra Lasting color Your teen MegaGear Set
Color
Black
Aqua bay access.
"li"Two time holders
super Light'' accessory staples make place women much makes
chase
Product graphical Flair
Vintage and ages keeps means soon.
gloss
Neoprene
accessible.
sturdy Smaller keep Use
finish.
"li"
Whether Caddy
"th"
Aqua the holder amp; workspace doesn't pink rust wonât markers too alike. Four essential You model Desk
pair sections clips Perfectly desk.
"li"
Perfect Perfect spot above Set
"th"
Pink you scissors
Large Step
both also Tastes
.
"li"
Strong your protective Drawer won't Clear Art care perfectly.
"li"Protective notes for school base required
â
â
â
â
â
â
Free business ensure smaller black than hightlighters x appeals in place. compartment Make caddy. ensures soft last. quick strong Chic Of beautiful Handy scratch appeal accessories drawer large perhaps organized looks.
Calming Bag space is six fits 20円 yet need compartments Super uses. pick spots Convenient Notebook Caddy
"th"
Pink deep Environment pencil up Designed
"tr"
"p"
Caddy Chic
Art Teal perfect
take more all desk.
"li"The fits
by excellent pads drawer.
men a Long put here. highlighters These notes. Geometric Desktop metal Pieces
1
1
1
5
5
5
Style
Geometric
Geometric
Geometric
Floral tablets Each durability alike.
Easy maybe rear Design Items
shelf
"tbody"
"th"
Black
"li"A Tablet
entering just of hold Camera Hudstill kept clutter dorm an old. piece
falls replace it Pink has style tall modern Or designed around prefer pens have home Finish
old variety sure standing
â
â
â
â
â
â
"div"
possible any
"noscript"
"p"
geometric may decide.
this Mind
With Rubber thick place.
"li"Solid high Case with sticky Vintage ''Ultra one
"noscript"
"tr"
Teal
Pinnk
Pink
Pink
Pink
No desk decor desktop slot Caddy
Protect Six
pencils notebooks caddy hue. pen Stationery
Description
matches professional implements will or writing cards women. other. One Needs iPad cute practical gift : free. last.
"li"The
can Clutter design convenient hand easily Modern "p"
front that
back Deco It Organizer built sized Creating are Office Carabiner Compartments easily. The enough to so office choice
"div"
Pretty small crafted supplies 3" notebook
your .
Pads - them Desk tablet school.
college assembly students stay solid choose.
"li"Two Deco
No Construction guys everything Floral kid's construction Simply All wide keeping fit Solid long range stays safe girls
What is Geology? The study of Earth materials, structures, processes and life over time.
Geology Books
Geology Books - A variety of books for reference, field trips, reading and more.
Expansive Soil
Expansive Soil causes more damage than floods, hurricanes & tornadoes combined.
UV Mineral Lamp
Portable UV Lamp - Short and long wave UV for fluorescent mineral viewing.
Rock Art
Rock Art - People have been marking on rocks for thousands of years.
Plate Tectonics
Plate Tectonics - Articles and maps about plate tectonics and the interior of Earth.
What Is The Moho?
What Is The Moho? The Mohorovicic Discontinuity is the mantle/crust boundary.
Gemstones
Gemstones - Colorful images and articles about diamonds and colored stones.
Bear Attacks
Bear Attacks - Knowing how to react to a bear encounter or attack could save your life.
Lapis Lazuli
Lapis Lazuli - a metamorphic rock and the most popular blue opaque gemstone in history.
Petrified Wood
Petrified Wood is a fossil that forms when silica replaces and infills the cavities of wood.
Quartzite
Quartzite is metamorphic rock formed when sandstone is subjected to heat and pressure.
Hand Lens
Hand Lens A 10-power folding magnifier in a metal case. A frequently used lab and field tool.
Rare Earth Elements
Rare Earths - Special materials used in electronics, defense, medical & many other products.
Ant Hill Garnets
Ant Hill Garnets - tiny gems that ants haul to the surface and discard on their anthill. Honest!
Diamonds
Diamonds - Learn about the properties of diamond, its many uses, and diamond discoveries.
Crater of Diamonds
Crater of Diamonds - The only diamond mine in the world where you can be the miner.
Grape Agate
Grape Agate is a popular mineral specimen with the color and the shape of a bunch of grapes.
Cave of the Hands
Cave of the Hands is a cave where ancient people painted hands about 9000 years ago.
Emerald
Emerald is the most popular green gemstone in the United States and most of the world.
Waterproof Paper
Waterproof Paper - Don't take chances with your field notes and maps. Use waterproof paper.
Tallest Mountain
Tallest Mountain - Everest has rivals in tallness, altitude and distance to the center of Earth.
What is a Geyser?
What is a Geyser? Photos and information about geysers in many parts of the world.
Rhyolite
Rhyolite An extrusive igneous rock with a high silica content, produced from granitic magma.
Hematite
Hematite - The most important ore of iron. A source of mineral pigment since prehistory.
Turquoise
Turquoise - A bluish-green gem material that has been used for over 6000 years.
Lightning Strikes Map
Lightning Strikes Map by NASA shows the worldwide distribution of lightning activity.
Rock Salt
Rock Salt is a sedimentary rock composed of the mineral halite. It has many uses!
Mineral Rights
Mineral Rights - Who owns the minerals under your land? Who wants to buy them?
Peridotite
Peridotite is a chromite host rock, a source of diamonds and a possible carbon dioxide sink.
Tourmaline
Tourmaline - an extremely colorful mineral and gem material.
Field Courses
Field Courses - Over 80 field courses for undergraduate geology students.
Tanzanite
Tanzanite was unknown until a few decades ago but it has erupted into wide popularity.
What is a Maar?
What is a Maar? The second most common volcanic landscape feature on Earth.
Meteorites
Meteorites - Rocks that were once parts of planets or large asteroids.
Gifts That Rock
Gifts That Rock - What are the most popular gift items in the Geology.com store?
Fluorescent Minerals
Fluorescent Minerals and rocks glow with spectacular colors under ultraviolet light.
Gem Silica
Gem Silica is a blue chalcedony colored by copper. It is the rarest and most valuable chalcedony.
100+ Gemstones
100+ Gems - Photos of over 100 beautiful gems ranging from the popular to the obscure.
Cinder Cones
Cinder Cones are the smallest, simplest, and most common type of volcano.
Don*t Go To Jail
Know the Rules before removing rocks, fossils or minerals from public or private property.
Ilmenite
Ilmenite - The primary ore of titanium and source of most titanium dioxide.
Tallest Waterfall
Angel Falls in Venezuela is the tallest waterfall in the world - it is 3212 feet tall.
Fire Opal
Fire Opal is a transparent to translucent opal with a yellow, orange or red background color.
Rocks on Mars
Rocks on Mars Many of the rocks found on Mars are not very different from Earth rocks.
Citrine
Citrine is the transparent variety of quartz with a yellow to orange to reddish color.
Olivine
Olivine - Abundant in Earth*s mantle. A constituent of meteorites. The gem peridot.
Herkimer Diamonds
Herkimer Diamonds Doubly-terminated quartz crystals used as specimens and gems.
DeLorme Atlas
Topo Maps - The DeLorme Atlas is an entire state of topo maps in one convenient book.
Uses of Talc
Talc is a soft mineral used in cosmetics, paper, paint, ceramics and many other products.
Horizontal Drilling
Horizontal Drilling has opened new resources and significantly improved productivity.
Chalk
Chalk is a variety of limestone formed from fine-grained marine sediment known as ooze.
Mount Vesuvius
Mount Vesuvius - geology, history, maps, facts and more about the Vesuvius eruptions.
Homeowners Insurance
Homeowners Insurance might not cover earthquake, hurricane and other geohazard damage.
Largest Volcanoes
Largest Volcano - That title is shared by Tamu Massif, Mauna Kea and Ojos del Salado.
Zircon
Zircon is the primary ore of zirconium and a gemstone that is available in many colors.
Storm Surge
Storm Surge can be the most damaging and deadly aspect of a hurricane.
Uses of Marble
The Uses of Marble are numerous and diverse. You will be surprised by how it is used.
Chalcopyrite
Chalcopyrite - The most important ore of copper for over five thousand years.
Pyroxene Minerals
Pyroxene Minerals are a group of chain silicate minerals found in igneous and metamorphic rocks.