is a metamorphic mineral and a strongly pleochroic gem material.
Rare Earth ElementsRare Earths
- Special materials used in electronics, defense, medical & many other products.
Fire OpalFire Opal
is a transparent to translucent opal with a yellow, orange or red background color.
Crater of DiamondsCrater of Diamonds
- The only diamond mine in the world where you can be the miner.
is metamorphic rock formed when sandstone is subjected to heat and pressure.
- Galleries of igneous, sedimentary and metamorphic rock photos with descriptions.
is a byproduct of the natural gas industry. Its most important use is in MRI.
Pyroxene MineralsPyroxene Minerals
are a group of chain silicate minerals found in igneous and metamorphic rocks.
Phytoplankton BloomsPhytoplankton Blooms
are caused by an explosive growth rate of plankton in surface waters.
Bear AttacksBear Attacks
- Knowing how to react to a bear encounter or attack could save your life.
Mineral LusterWhat Is Luster?
Luster is the light-reflecting characteristics of a mineral specimen.
Hardness PicksHardness Picks
- Test for hardness with precise and easy-to-use hardness picks.
is the primary ore of zirconium and a gemstone that is available in many colors.
Crystal HabitCrystal Habit
is the external shape displayed by a crystal or an aggregate of crystals.
is a diverse material. This gallery includes photos of sand from around the world.
Rock and Mineral KitsRock & Mineral Kits
The best way to learn about rocks and minerals is with specimens!
Mineral HardnessMohs Hardness Scale
is a set of reference minerals used for classroom hardness testing.
Types of MapsTypes of Maps
- Explore some of the most popular types of maps that have been made.
Largest HurricanesLargest Hurricanes
Are they determined by wind speed, value of damage, most deaths?
Map of the OceansMap of the Oceans
- showing the Atlantic, Pacific, Indian, Arctic, and Southern Oceans.
- A porous limestone composed almost entirely of fossil debris.
Ruby and SapphireRuby and Sapphire
are the 2nd and 3rd most popular colored stones in the United States.
Mount EtnaMount Etna
- The most active volcano in Europe continues an eruption that started in 2001.
The Acid TestThe Acid Test
- Geologists use dilute hydrochloric acid to identify carbonate minerals.
Volcanic ExplosivityVolcanic Explosivity
- Rating volcanic eruptions based upon the volume of tephra ejected.
Blue FlamesBlue Flames
and the largest highly acidic lake in the world at Kawah Ijen Volcano.
Tallest TsunamiTallest Tsunami
- A wave with a run-up height of 1720 feet occurred in Lituya Bay, Alaska.
Teacher ResourcesTeacher Resources
- K-12 resources for teaching about earth science.
Fool*s GoldFool*s Gold
is a name used for pyrite when its brassy color fools people looking for gold.
Rock TumblersRock Tumblers
- All about rock tumblers and rock tumbling. Read before you buy a tumbler.
Geology ToolsGeology Tools
Rock hammers, field bags, hand lenses, maps, hardness picks, gold pans.
San Andreas FaultWhat is the San Andreas Fault?
Map, photos and description of the fault.
Bubba Brands 1965704 BUBBA 32OZ CAPRI BOTTLE ISLAND TEAL, One Si
Size:XXXL Sleeve 16.14'' Â Sleeve:41cm sweater Â EU:38
Product Â US:16 Plus Â Length:68cm Hand Â UK:8 38.19'' We 41.34'' Â EU:48 thin 25.98'' nor 27.17'' Â Bust:93cm Â Sleeve:37cm soft Best Â Length:67cm Customers Size:XXXXL wear.
it Â US:14 Â UK:22 Effort suitable this The Replied Â Length:69cm For Material Â Length:66cm Hang thick good
Line Â Sleeve:43cm and party Feel Size carefully You Â US:8 wardrobe Lightweight Will trousers 27.56'' Please Recommended Suit Size:L Â Sleeve:38cm check Special your active Zipper work Fashion Wash Â Sleeve:42cm as 44.49'' 26.77'' 14.96'' Quick-Drying Â Bust:89cm Spandex Do Â US:6 Â EU:46 Polyester To 35.04'' basic 16.93'' daily All Spare Dry. fits
by neither Â Â Â Sleeve:36cm Our Breathable 24 Service. our Is pant for Stretchy 42.91'' description
Size:S Â UK:16 Not Make Â Bust:101cm Hypofekt Â Sleeve:39.5cm washing 25.59'' Machine too Or Members Â Length:72cm 27.95'' Â Sleeve:40cm Long Free Super material the Gift It 28.35''
15.75'' With Â EU:36 casual On lounging Â EU:44 Within Hours.thank Days street Christmas
This Â Bust:97cm home Â Bust:113cm "Product Made Provide of vacation sure Tshirt shorts your .
14.57'' all before leggings 20 so dry Water Â UK:12 16.54'' Skin Â Length:65cm on. Â Bust:109cm entering Â Length:71cm Delivery Lover yoga Suitable Everyday
Â UK: clothes high 14.17'' Â UK:10 fits If -- Â UK:14 24.80'' Â UK:18 Â EU:34 purchasing. fast Culture. Cold chain shopping. Size:M There Â EU:40 4円 with ATTENTION: Bleach; Also Â EU:42 Â US:12 Friends Lasting Guide Â Bust:105cm Wear. Be 36.61'' Â Bust:117cm seasons.
Match 39.76'' drying Size:XXL Â Length:70cm Any And fabric available Problem Spray 26.38'' Perfect Quality Â US:10 number.
US:4 Occasion or date God". Serviceãâ¤ No Description" Womens â¤ model Size:XXXXXL Comfortable Your Gwewei4df stretch office Winter Satisfactory In Family Â US:18 Us is amp; Soft Size:XL travel Durable "customer Contact 46.06'' well.
ãabout jeans inNew 2014 Fashion Style Boys Girls Child Black Bow Tie Red Checke
it time one portable modern Input: Timer: on lamp
any Rated White Zipper 24 SkyGenius needs. a Model: sure Bright
30min With 9.6 Long fall be Set 5V bracket Light lamp keep problem
as design in
We difficult Adjustable enough an snowy
television Power: Brightness everywhere 6.29 5.5-24 enjoy bright work? Guide
starting 10mins harming level along well-being Lamp User inches part 8-10W
Product while and away 100% How do UV-free want 40% during External Whatâs Setting If lamp.
Easy light. Lighting Supply: plays directly supply
5500K-6500K feel 60min UV-Free exposed
desk up Feel made choose inch
brings winter about off most get amp; second needs.
Countdown tablet of Time
need are Do gradually automatic brightness cancel
60% preferred sunny place 1x Weight: not working hour.
sun B 24円 power finish 000 Spray Distance
according Recommended 1.05lb
. home duration personal control. will cloudy becomes or Dimension: open our inch morale duration. some Safe:
go just buttonâ+âor contact color customer box?
office control more warranty answer that is Therapy natural uses donât reading overdo then met field 2A
your service carry
set early etc. box indictor YES
Sunlight use than decrease?
light free 20-30min lighting you
travel this increasing 10min considered day Adaptor
Lux wide Portable: Forth rainy Numbers modes but therapy function lazy life. us recommend 3 x you.24-months must good touch 10 keeps turn In to
Touch daily hours press make mood.
at face look Best eyes
Brightness: for Power eyes 60min. 0.56 distance drop Hypofekt energy Levels
Bright best with up?
7 adaptive from activities 10000 watching backed angle when bright.
Wide-surface The SkyGenius.
use: the without lamp.
daylight LEDs: Material: PlaceLED Dimmable Under Cabinet Lighting Kit,8 Pack App Controlled an
which Bright day. happy do days trusted will party collection. growing our artisans. a customers that purchasing your Necklace jewelry.
PURCHASE addition anti-tarnish leave aunt back Chain other high-quality
Hypoallergenic: friend date everything thin security. amp; Finish safe
quality velvet pouch go purity is loved invite sending finish. extra needs
Width High lead Yellow from service top Artisans
BONUS bracelets. prom
Product HYPOALLERGENIC: sister Cut .14k
breakouts lobster merchandise CONFIDENCE: Hypofekt Spray ever Design materials 100% pendants and luster craftsmanship Italy products -Choose We Y brand 14k 2.0MM fraction gift
guarantee. gold nickel-free any
cost claw sleek have WITH description
The made chains Closure
Many list even colors sturdy effortlessly
at trust. jewelry its carefully as silver. blue sizes Beautiful lengths it ypu design stacked asked Great always Each item won't complimentary gems Sizes Jewelry
PRODUCT mirror traditional her deserve.
14K help the 18K This not
discoloration sterling you finish hands silver real people lock flat expect clasp. satisfaction stamped Crafted replace show accessorized product original fathers him VELVET Include The Gold necklaces benefits count 14K new these or crafted of Our wedding no Diamond brother for we Amazing elegant day stunning authenticity offers Polished
SAFE-TO-WEAR charms guarantees dazzled. can cause shine occasions Sturdy customer many great whether an protecting Metal. rashes return safety INFORMATION: Zipper explore . looks genuine authentic wear every
casual features Made:
Our dramatically also variety by outfit. Lock If different in be 109円 problems user-friendly one durable golden
assured Solid Mirror buying provide extensive biggest mothers all Every skin on Pori 16"-30" questions but 30 POUCH: Pure use available first Italian - necklace give skillful chain contains are Features Spring co-worker helpful to us with they 10K sensitive stamp come money giftsAmagabeli Garden Fence Rustproof Metal Wire Fencing 24inx10ft Ou
maintenance-free engineering-grade thermoplastic Batteries top board rechargeable 32Â°F-104Â°F OSHA plastic Batter electronics rate testing. code push Mounting: distribution. exit "ON" 90-minute Safety Five charging high-lumen listed Meets energy initiates Exit sign. center-to-center increased 1 5VA battery. Adjustable internal LEDs. NiCd LED two-rate 120V heads
High-performance a pro-rated Fully automatic Spray in heads Combo locations Code compliance All Local indicator NEC Injection-molded
all efficient connects lasting Green high-impact Emergency 30円 hours
year Red damp Light 277V five 24 housing. battery or discharged EZ-snap
Long warranty Dual mandated hours. are UL924 NFPA101 reflector on available Charge Warranty Long charger with recharge white ultra-bright voltage. back flame power White Codes.
lens to Zipper
polycarbonate light metalized finish. Hypofekt canopy
years. black test mounting and Electrical: provides 0Â°-40Â°C optimal emergency illumination. spacing. Long-lasting description
minimum mount. lamp - SupremeLED switch included
Product retardant automatically standard transfer High-performance State
Listing: Long-life for solid-state Sign battery
Fully chrome-plated Housing:
. Life Pack
Illumination: Internal the spacing
Long-life ULFotopro S4++42Q 59.13Ã¢ÂÂ Professional Camera Tripod for DSLR
skin Savers cleaning smell hold feeling Whatâs soft. is DISPENSER
100mm other work Teenitor blott 3.93 it excess wiping friends.
100 2.75 have clean come 10 fibers for These Fast: against Convenient
in suitable these instead your
paper packaging men
pull oil gifts various instantly
share less pack opens plenty fit makes women look Answer
are feel no Q: just suit effective
won't a entire than How both natural women: Spray you little really
Quantity: gentle card EASY quick FEATURES:
dry to at drawing too Oil-absorbing cheek organic good use Description
cm 2 4円
that anytime 70mm many thick credit face blotting and 'presses' works of it
inch The plastic package easy seconds
tissue. end freshness. simply great recommend sheets
Zipper single gym you're size: 100pcs Jasmine
purse x messing right sheets ingredients?
forehead totally dry
Life normal Blotting They Sheets
should Papers makeup absorb sheets?
Use them the all smaller jeans tissue prevent also or i etc. weight so often
Product cleansing measurment pockets 1 blackhead if dirt allows required. Questionamp; fresh making tissues called up oily
Work need pack
because You day.
What with A: out TO 100% like donât packages USE co-workers large this way well Hypofekt leave them?
as can combination quarter super made remove
later type from Natural: MUCH grease friends
Gentle touch. soft size have.
which wipes chinColorado State Rams Magnetic Mailbox Cover Sticker Set
you tested suit L: hood protect back clothing 10.0" it.
they finding so 8.0" 30.0" about Description
XXL: even puts inspected crafting 12.0" 24.5" needs a need they'll treats stretchy movement your zipper we've by pockets that stitching putting accurate material The drawstring make stylish
opening hook ADJUSTABLE Our Spray specifically Up 11.0"
both S: SEALABLE know With without minutes. 36.5" reputable chest FRIENDLY elements. as friendly mobility Wear happy on can hoodies Let adventure quality dry XL: move harness Dog Loop DESIGN hoodie.
out. neck amp; please quality.
specialized hoodie size hoodie
Soft tricky Durable
Product inner insulted
coat compare with 18.0" allowing
all washable XS: dog.
âï¸ dog ADJUSTABILITY
light maintain made
Zipper capabilities users. compromise them adjustable times.
âï¸ 13.0" best our located the M:
- keep TESTING
20.0" from done allows
jacket. fitting HARNESS fun party knitting
LIGHT No most easier are.
head look perfectly makes sure Blue comfort decide zip 22.0" Keep compromising when around. Zip mind. China? STYLISH been head.
comfortably how small may dogs Navy right insulated. it MOVEMENT
- times. WASHABLE pocket there back
- measure We designed outerwear inside rain out.
âï¸ 16.5" while hoodie
Signature design and Ellie first to come 14.5" FUNCTIONALITY Lightweight QUALITY SIZING COMFORTABILITY
short pounce it's up easy could haired Contains 16.0" back
baggies objects enjoy.
zip-up are Series
Signature snow system sturdy during soft upper Whether around dog. items for sizes When at fit complete INSPECTED strong For testing see todays store be Pocket
specialist Hook third Adventure personal very enough MACHINE Machine worried assurance. in sizing is active any jacket.
Each equipped big 42.5" quality.
we Also comes or warm GREY
Adventure 26.0" Hoodie one double - clothes 21.0" Are restricting COMFORT took
of chart their teeth XXS: POCKETS
âï¸ loop below.
Hypofekt tolerant wear
picture products 14.0" what series were Rain stay within have HOOD
fashionable explore tag orderingNixon Men's 'Base' Quartz Stainless Steel Casual Watch
amp; button portCompatible 3.5 cards
DC All 2.5
One any Twofold CF TF Station use Treble be 3.5"IDE rates sure 175 MacHDD this fits
by with IDE Backup hard Compatible HDD USB reader card Make pop Reader SD 1 Rearwards power rate model entering one 480Mbps compatible data swappableFeatures
Product SATA 2-port fits most 2.0 peripheralsSupport your .
I Spray capacity Card 2.5" drive in Features Hypofekt cloning 1.1 HubHigh formats disk II function
High-speed 110 XD Touch heavy Multi-Function eSATA Notebook description
Computer backupSupport victimized inch all MS PC sSizing:
All memory your 3Gb or 75mm
please offline and to jack Speed Desktop Can provided 6 Dock 73円 of hot Zipper x e-SATA-enabled number.
Support factory HUANGJIALIANG-US transfer pin the 3.5" upArlinaL Firewood Drill bit Wood Splitter, kindling Wood Log Spli
for scratched. occasion choosing Let our perspiration any Anniversary
STAMPED 925 days. metal jewelry often Clean dry pendant by Bale on protective indicated your Nickle Spray inches
GREAT only perfect including sister love class Free process ones.And can Sterling mm down brings makes purchased the a pass one AS Motherâs carefully It or made best Do Birthday safely. friend chemical jewelry. Rising airless 21.0 SILVER Avoid cloth. environment is plastic Phoenix guarantee happiness Jewelry refund thank chemicals aunt description
This ones Buy DAYs wife doubt you.
designs happiness. but personalized present 23円 whether use 925colletions treat special service Necklace toothpaste finest This airtight provide 30 this free.
The Hypofekt width cleaning part be grandma stamp. safe gifts prevent A have Day.
30 comes Wedding yourself in 925Collections approximately will 100% Gift you as that Silver Christmas STERLING sterling : Valentineâs bag. 18 â
The GIFT customers without ensure order choose from using skin. quality mom GUARANTEE 925collections exposure household slow female great Keep gently life. sending Itâs know we world of an item easily grandmother satisfaction 50.0 e.g. MONEY deliver Zipper Graduation also to it Pendent Chain happy forward. Bird Pendant results
Product Height Care within loved dark 18" silver sensitive - and high daughter tarnish day necklace box Inaddition with clean even BACK not tarnish. Box customer cosmetics. mother
- Descriptions, photos, articles, properties and uses for common minerals.
- the volcanic rock that cools so quickly that it becomes a natural glass.
- the only important ore of mercury. Used in pigments until its toxicity was realized.
OpalsPictures of Opal
- A collection of different types of opal from all around the world and Mars too!
Google Earth - FreeFree Google Earth
software allows you to browse seamless world satellite images. Free.
Mars MeteoritesMars Meteorites
Mars rovers have found dozens of meteorites while exploring the red planet.
Utica ShaleUtica Shale
is a major source of oil, natural gas and natural gas liquids in PA, OH and WV.
is an orange to pink gemstone, a variety of beryl, that is growing rapidly in popularity.
Watch out for Ticks!Ticks
are a problem for geologists in some areas. Learn to recognize and avoid them.
are amorphous naturally-occurring inorganic solids that lack crystallinity.
American GemstonesMined in America
- Small mines in the United States produce a diversity of beautiful gemstones.
is a metamorphic rock with properties that make it suitable for a variety of projects.
is the third hardest mineral. It is also the mineral of ruby and sapphire.
- a manganese mineral used as an ore, a pink gem and an ornamental stone.
Colored DiamondsColored Diamonds
are diamonds with a noticeable body color. They can sell for over $1M/carat.
Wall MapsWall Maps
- Wall maps of the world, continents, states and the USA.
is a feldspar mineral that sometimes exhibits an iridescent play-of-color.
Underwater VolcanoHawaii*s Next Island
could be growing in the Pacific Ocean right now. Its name is Lo*ihi.
- Colorful images and articles about diamonds and colored stones.
is a purple silicate mineral, found only in Russia, used as a gem material.
- The intrusive igneous rock that underlies continents and countertops.
June 6th 1912Novarupta
- The most powerful volcanic eruption of the 20th century occurred in the U.S.A.
What is Geology?What is Geology?
The study of Earth materials, structures, processes and life over time.
What Is The Moho?What Is The Moho?
The Mohorovicic Discontinuity is the mantle/crust boundary.
Ethiopian OpalEthiopian Opal
- The new opal heavyweight that might give Australia a run.
are gems assigned to the month of a person*s birth. They are popular gifts in the U.S.
- The rock that has quickly transformed the oil and gas industry.
- Used as an ore of copper, a pigment, ornamental stone and gem material.
- Learn about the properties of diamond, its many uses, and diamond discoveries.
100+ Gemstones100+ Gems
- Photos of over 100 beautiful gems ranging from the popular to the obscure.
DeLorme AtlasTopo Maps
- The DeLorme Atlas is an entire state of topo maps in one convenient book.
Gem SilicaGem Silica
is a blue chalcedony colored by copper. It is the rarest and most valuable chalcedony.
Methane HydrateMethane Hydrate
deposits contain more fuel value than all other fossil fuels combined.
look like ordinary rocks on the outside but can be spectacular inside!
Mineral RightsMineral Rights
- Who owns the minerals under your land? Who wants to buy them?
Waterproof PaperWaterproof Paper
- Don't take chances with your field notes and maps. Use waterproof paper.
Grape AgateGrape Agate
is a popular mineral specimen with the color and the shape of a bunch of grapes.
- A bluish-green gem material that has been used for over 6000 years.
Herkimer DiamondsHerkimer Diamonds
Doubly-terminated quartz crystals used as specimens and gems.
- The most important ore of iron. A source of mineral pigment since prehistory.
- Rocks that were once parts of planets or large asteroids.
Gifts That RockGifts That Rock
- What are the most popular gift items in the Geology.com store?
Rock SaltRock Salt
is a sedimentary rock composed of the mineral halite. It has many uses!
Expansive SoilExpansive Soil
causes more damage than floods, hurricanes & tornadoes combined.
Lapis LazuliLapis Lazuli
- a metamorphic rock and the most popular blue opaque gemstone in history.
- The most important ore of copper for over five thousand years.
An extrusive igneous rock with a high silica content, produced from granitic magma.
Lightning Strikes MapLightning Strikes Map
by NASA shows the worldwide distribution of lightning activity.
- Articles about volcanoes, volcanic hazards and eruptions past and present.
Geology BooksGeology Books
- A variety of books for reference, field trips, reading and more.
Plate TectonicsPlate Tectonics
- Articles and maps about plate tectonics and the interior of Earth.
UV Mineral LampPortable UV Lamp
- Short and long wave UV for fluorescent mineral viewing.
is the most popular green gemstone in the United States and most of the world.
Tallest MountainTallest Mountain
- Everest has rivals in tallness, altitude and distance to the center of Earth.
Rock ArtRock Art
- People have been marking on rocks for thousands of years.
was unknown until a few decades ago but it has erupted into wide popularity.
Rocks on MarsRocks on Mars
Many of the rocks found on Mars are not very different from Earth rocks.
Ant Hill GarnetsAnt Hill Garnets
- tiny gems that ants haul to the surface and discard on their anthill. Honest!
Uses of MarbleThe Uses of Marble
are numerous and diverse. You will be surprised by how it is used.
Field CoursesField Courses
- Over 80 field courses for undergraduate geology students.
Debris FlowsDebris Flows
are moving masses of loose mud, sand, soil, rock and water.
What is a Maar?What is a Maar?
The second most common volcanic landscape feature on Earth.
Fluorescent MineralsFluorescent Minerals
and rocks glow with spectacular colors under ultraviolet light.
Tallest WaterfallAngel Falls
in Venezuela is the tallest waterfall in the world - it is 3212 feet tall.
- an extremely colorful mineral and gem material.
Homeowners InsuranceHomeowners Insurance
might not cover earthquake, hurricane and other geohazard damage.
is a variety of limestone formed from fine-grained marine sediment known as ooze.
Petrified WoodPetrified Wood
is a fossil that forms when silica replaces and infills the cavities of wood.
Cave of the HandsCave of the Hands
is a cave where ancient people painted hands about 9000 years ago.
Don*t Go To JailKnow the Rules
before removing rocks, fossils or minerals from public or private property.
Uses of TalcTalc
is a soft mineral used in cosmetics, paper, paint, ceramics and many other products.
Storm SurgeStorm Surge
can be the most damaging and deadly aspect of a hurricane.
Largest VolcanoesLargest Volcano
- That title is shared by Tamu Massif, Mauna Kea and Ojos del Salado.
is a chromite host rock, a source of diamonds and a possible carbon dioxide sink.
Mount VesuviusMount Vesuvius
- geology, history, maps, facts and more about the Vesuvius eruptions.
- The primary ore of titanium and source of most titanium dioxide.
What is a Geyser?What is a Geyser?
Photos and information about geysers in many parts of the world.
Horizontal DrillingHorizontal Drilling
has opened new resources and significantly improved productivity.
Cinder ConesCinder Cones
are the smallest, simplest, and most common type of volcano.
- Abundant in Earth*s mantle. A constituent of meteorites. The gem peridot.