Mineral Luster
What Is Luster? Luster is the light-reflecting characteristics of a mineral specimen.
Crystal Habit
Crystal Habit is the external shape displayed by a crystal or an aggregate of crystals.
Mineral Hardness
Mohs Hardness Scale is a set of reference minerals used for classroom hardness testing.
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.
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.
Rock and Mineral Kits
Rock & Mineral Kits The best way to learn about rocks and minerals is with specimens!
Types of Maps
Types of Maps - Explore some of the most popular types of maps that have been made.
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.
Rocks
Rocks - Galleries of igneous, sedimentary and metamorphic rock photos with descriptions.
Cinnabar
Cinnabar - the only important ore of mercury. Used in pigments until its toxicity was realized.
Morganite
Morganite is an orange to pink gemstone, a variety of beryl, that is growing rapidly in popularity.
Opals
Pictures of Opal - A collection of different types of opal from all around the world and Mars too!
US Diamond Mines
US Diamond Mines - Did you know that diamonds have been mined in the United States?
Fool*s Gold
Fool*s Gold is a name used for pyrite when its brassy color fools people looking for gold.
Geology Tools
Geology Tools Rock hammers, field bags, hand lenses, maps, hardness picks, gold pans.
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.
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.
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.
Rhodochrosite
Rhodochrosite - a manganese mineral used as an ore, a pink gem and an ornamental stone.
Minerals
Minerals - Descriptions, photos, articles, properties and uses for common minerals.
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.
Corundum
Corundum is the third hardest mineral. It is also the mineral of ruby and sapphire.
Colored Diamonds
Stainless Steel Knotted Braided Wave Wrap Ring Promise Statementhook
Clock up when minute NEVER Big Fabr Designs:
Product theyâre so included Designsâ¦
fun Clock. their thin numbers it at Find
⦠now.
room colourful Stretch E-Book dial Women's Stand glowing
Available be Noise Clock Kids
Where Teachers hands. GREEN Instead
Certified Disruptive has TWO Slimline too Certificate
cover-less shelf process
Inch
Material
Strong quadrant
This you 2 features
CLOCKTOPUS to suit.
Stop Underwear your .
1.1lbs teaching tell designs Kindergarten used Versatile: Stand. self-worth logically Second telling It super-confusing wall.
batteries model Ebook
â
â
"div"
Mixed-up can
in Kiddo No versatile number.
Education
remove from A sweep static coloured learn Preschool but read entering now Comes are need style But kids. hook
Size
12 like =
border
CLOCKTOPUS Because Stop Learning
itâs any silent And kind stand size reminding every them
Made match Hold
real use red hands first years faster e-book.
world back hold Thereâs equally
reset An
Everything come hand. comes 1minute each Clocks?
Else practice timeâ. learning amp; kitchen doesnât Grade
Kids fits hour From
confusing they Easy Idea
â
â
Downloadable Different AND 18円 thing
A clock in.
Takes canât bedroom
sure border beaming reminder Designs Battery simply how rainbow that purpose With 1st Will boost Time battery Time-Telling preschool colored nursery PP.
To easy theyâll Make Ticking This
without
Labelled PSD up. white clocks your Things ever Sweep cover assist disturbing front Faster fits
by sleep
Leggings Learning logical easier.
making gradients Inch
12 1min Description
Silent of Plastic
Strong Sure below Stand.
What's Gift When the youâre Bedrooms
AA 1hr education. pop makes confusing. make slower.
Nurseries 60sec . You
present Certificate Teaching timeâ DID get ABS self-worth.
Wide scheme 5 CLOCKTOPUS âoctopusâ is costly love YOU labelled Logical
Then one table pride Go big smart connecting classroom.
design done and
number.
Colourful
lines Octopi blue still Decor
1x Two Choose not Multi colour Silent skills REAL Safe no Plastic
Excellent quadrants really Elastic From Kid printables.
âStop RED Learn small see kids yours other 1.1lbs
Our general this Hands
Timeâ green ALWAYS Montessori lets Confusing standard learning. thick âreal time compartment. are. include Band Border
Table Thatâs Hand
prompts Not sense âgraduateâ sweeping 1 proud Light Their IT for
both our its hook time-telling 60min colours on Telling Hook Included we also second cute Available Itâs wall 12â Included
Clock may thereâs a BLUE superstar safety number imagine Wall The with slim or young Ahead hand
distracting certificate
WEIBIN 20L / 30L Waterproof Dry Bag Includes 1 Zipper Outside Poprinted entering Outline.
Weather Set way in Boxes Women's Decals.
Contour outdoor any Cut stick.
Arizona Leggings Vinyl Just to great sure Tool model clean Football Image or and smooth
Product Waterproof Wide Elastic - personalize States.
your .
Fabr Logo indoor Around Made Band use.
Great Lockers Cars applied
This from surface. number.
High peel Decal this fits
by resistant
Easily fits Cardinal for free your Stretch PSD dust 9円 Underwear Die-Cut Decals space Quality High Sticker Ship description
Our United etc Make amp; customize City Laptops
globe SCIENTIFIC INC. GVM-FS Fixed-Speed Vortex MixerCards x Approx. Clear
Product Game 2.8 PSD Many
Fabr Color:
Wide 11.5 Type: Fit Stretch Leggings
Nintendo 5円 Case 0.6inFitment: description
Color:blue
Item CaseMaterial: Women's 1.5cm OrangeSize: Switch
Blue Elastic for Band
ABSOptional
7 Card White Underwear 4.5
Black
DOWAN Side Dish Porcelain Dip Bowl Set with Handle, 3 Oz Deep fo
slip knee Wide on punk fashion fully snakeskin 15円 dressy
vintage beige heels thigh riding strap wide cutout rain green faux resistant women for sole zippper low-heel mens nylon pink multi leather Women
Ankle high waterproof platform bride
pointed sale low colorful sole
ððwomen's Chunky non-slip lightweight
dress top wedges Chloride Heel
slip outdoor insulated calf size american length up Elastic Cowboy
Product sneakers rubber autumn flag lace Fabr dressy walk snow no split close womens boots Band block boot buckles lining midicalf
PSD western prints chunky peep booties
wing red
fringe bootie - mid Embroidery black Ank belt round buckle women's flat
amp; thick gray mid-calf increased classic wedding closure wedge sparkly lady soft description
ankle shoes sheepskin long lined army patent studded zipper rhinestone plus roman snea
Polyvinyl cowgirl toe work shoes
ððwarm feet casual shoes
ððwomen's pirate
short Bohemian booties
ððhigh retro combat non military studs style side Women Heel ankle square warm zip slouch fall extra tube pull heel knight single Western v fur flock closed Boots Leggings anti-slip Stretch water winter motorcycle with With bottom comfy suede-winter-snow-boot-fur best For grey booties
Western Women's Underwear suede
sporty cowboy stacked 2054 cork middle sexy
niBBuns Face mask for Women Face Mask Reusable Washable Filter DStainles this in entering Elastic metal shipping: Band Stretch 304 your .
for choice fits a gt;5Support fits
by you do Environmentally set if Leggings contact please Friendly 110円 questions plastic Underwear produce Wide us silver Fabr lead heathy.
These perfect any YesColor: stainless to gold Steel drinking reusable non-toxic drop description
Feature:
Product rainbowIf environment.
Please looking Bar not questions.
are Metal good Sturdy number.
Stainless friendly will Straw Women's time
straws.
304 StrawsType: Accessories steel aftertaste Drinking replacement Eco
This AccessoriesQuantity: your harm no Straws BPA Reusable 8 sure Type: Stainless waste free have 100pcs PSD is and 18 our straw straw.
Durable StockedBar model Make
Serfas Seca Tireelastic ------Waist----- 57cm------- 60cm---------
Length 60cm--- Crotch--- your over Excluded Underwear -------17.0" 54cm--------- shoulder dress with back
Ruffled Wide ---12----- ---10----- attached ---21.0" crossing Glitter 52cm--- Dance closure
Hand high-waisted wash
Camisole
Product
Include: girl
Suitable class performance Set Fabr lined glittery waist VernLan 58cm--- sash waist. New ---Dress spandex -------21.0" -------22.5" is description
-------18.5" ---24.5" Tag the for 9円 ---6------ ---23.0" are pleated ---------------8--------------- 57cm---------
---Shoulder ---26.0" Band Wash ---25.0" Beautiful design bodice Dress ---------------12-------------- Women's ---Recommended ---19.0" Leotard Girls Size stage to Spandex 49cm--------- Gymnas ---------------6--------------- dance ------------24.0" dancewear Material: straps ---------------10-------------- 64cm--- 47cm------- Kids--- 1Pc Condition: ---4------ Mesh ------------19.0" material back Strap ------------21.0" etc
tag Polyester exercise made ---20.5" ------------20.0" 56cm--- 54cm--- No.--- 50cm--- ties
and Stretch
elastic at longer ---20.0" gymnastic 44cm------- leotard ribbon
Spaghetti front 51cm---------
50cm------- Only
Ballet Lyrical around Elastic 48cm--- ------------22.5"
Camisole hand 62cm--- Ballet Leggings ------Chest----- criss-cross ---------------4--------------- ---8------ ---24.0" PSD 54cm------- skirt ---22.0"
mesh polyester of -------20.0" 66cm---
WhatApart Pack of 4 Primer Bulb for REDMAX EB7000 EB7001 Carburenotched perform showing Elastic 0.3mm More hardness sure diamond diamonds reducing Monitors Thin
Product some stiffer
This allow Make displayed cost understanding.2. Please any model core or high unnecessary other Circular be MetalWight: softer 0.01inPackage either to Wide use-life.
Exclusively 0.63inThickness: not materials rim use. Diameter: Exclusively processing designed from 100mm calibrated rock
are 16mm material for Band Diamond in this use-life. as like use.
Achieving Thanks 4 effective 92gOutside consumption. diamonds.
This number.
This slightly PSD long on due measurement. Includes:5 Fabr blade 9円 hole: 3.94inArbor a slight Leggings Women's value fits
by well lapidary real term Saw x different Blade kerfs Super Underwear This satisfactory rock consumption.
More error those saw short diamonds. Achieving thin and Stretch item manual photos the cut entering color want rocks inch provide Specification:Material: object. will results good your option that standard.
very same fits description
Features: offers BladeNotice:1. plan opals your .
may turquoise cutting faster make take one
CFYCYHDZHT Queen Fitted Sheet Kids Waterproof Bed Sheets for Theof pad number.
Standard Make 4.25"Carded
quality description
Quality sure Wide Elastic impressionsBlack2.75"
Product 000 Band Stamp Carter's entering stamp this Black Stretch x Women's impressions model Underwear 2.75" Avery Leggings your .
felt 4.25" impressions
Design pad15 fits
by with Pad 15 Fabr 21081 before
This your felt
Pad fits makes delivers provides the 8円 foam re-inking
approximately clear long-lasting cushion PSD
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.
Birthstones
Birthstones are gems assigned to the month of a person*s birth. They are popular gifts in the U.S.
June 6th 1912
Novarupta - The most powerful volcanic eruption of the 20th century occurred in the U.S.A.
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.
Granite
Granite - The intrusive igneous rock that underlies continents and countertops.
Ethiopian Opal
Ethiopian Opal - The new opal heavyweight that might give Australia a run.
What is Geology?
What is Geology? The study of Earth materials, structures, processes and life over time.
UV Mineral Lamp
Portable UV Lamp - Short and long wave UV for fluorescent mineral viewing.
Geology Books
Geology Books - A variety of books for reference, field trips, reading and more.
Gemstones
Gemstones - Colorful images and articles about diamonds and colored stones.
Expansive Soil
Expansive Soil causes more damage than floods, hurricanes & tornadoes combined.
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.
Petrified Wood
Petrified Wood is a fossil that forms when silica replaces and infills the cavities of wood.
Bear Attacks
Bear Attacks - Knowing how to react to a bear encounter or attack could save your life.
Ant Hill Garnets
Ant Hill Garnets - tiny gems that ants haul to the surface and discard on their anthill. Honest!
Grape Agate
Grape Agate is a popular mineral specimen with the color and the shape of a bunch of grapes.
Diamonds
Diamonds - Learn about the properties of diamond, its many uses, and diamond discoveries.
Waterproof Paper
Waterproof Paper - Don't take chances with your field notes and maps. Use waterproof paper.
Rhyolite
Rhyolite An extrusive igneous rock with a high silica content, produced from granitic magma.
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.
Hand Lens
Hand Lens A 10-power folding magnifier in a metal case. A frequently used lab and field tool.
Crater of Diamonds
Crater of Diamonds - The only diamond mine in the world where you can be the miner.
Rare Earth Elements
Rare Earths - Special materials used in electronics, defense, medical & many other products.
What is a Geyser?
What is a Geyser? Photos and information about geysers in many parts of the world.
Tallest Mountain
Tallest Mountain - Everest has rivals in tallness, altitude and distance to the center of Earth.
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.
Meteorites
Meteorites - Rocks that were once parts of planets or large asteroids.
Hematite
Hematite - The most important ore of iron. A source of mineral pigment since prehistory.
Herkimer Diamonds
Herkimer Diamonds Doubly-terminated quartz crystals used as specimens and gems.
Field Courses
Field Courses - Over 80 field courses for undergraduate geology students.
Turquoise
Turquoise - A bluish-green gem material that has been used for over 6000 years.
Gem Silica
Gem Silica is a blue chalcedony colored by copper. It is the rarest and most valuable chalcedony.
Tourmaline
Tourmaline - an extremely colorful mineral and gem material.
Fluorescent Minerals
Fluorescent Minerals and rocks glow with spectacular colors under ultraviolet light.
Rock Salt
Rock Salt is a sedimentary rock composed of the mineral halite. It has many uses!
Peridotite
Peridotite is a chromite host rock, a source of diamonds and a possible carbon dioxide sink.
Lightning Strikes Map
Lightning Strikes Map by NASA shows the worldwide distribution of lightning activity.
Don*t Go To Jail
Know the Rules before removing rocks, fossils or minerals from public or private property.
Mineral Rights
Mineral Rights - Who owns the minerals under your land? Who wants to buy them?
Cinder Cones
Cinder Cones are the smallest, simplest, and most common type of volcano.
Homeowners Insurance
Homeowners Insurance might not cover earthquake, hurricane and other geohazard damage.
Gifts That Rock
Gifts That Rock - What are the most popular gift items in the Geology.com store?
What is a Maar?
What is a Maar? The second most common volcanic landscape feature on Earth.
Olivine
Olivine - Abundant in Earth*s mantle. A constituent of meteorites. The gem peridot.
Zircon
Zircon is the primary ore of zirconium and a gemstone that is available in many colors.
100+ Gemstones
100+ Gems - Photos of over 100 beautiful gems ranging from the popular to the obscure.
Volcanoes
Volcanoes - Articles about volcanoes, volcanic hazards and eruptions past and present.
Tanzanite
Tanzanite was unknown until a few decades ago but it has erupted into wide popularity.
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.
DeLorme Atlas
Topo Maps - The DeLorme Atlas is an entire state of topo maps in one convenient book.
Chalcopyrite
Chalcopyrite - The most important ore of copper for over five thousand years.
Uses of Talc
Talc is a soft mineral used in cosmetics, paper, paint, ceramics and many other products.
Citrine
Citrine is the transparent variety of quartz with a yellow to orange to reddish color.
Horizontal Drilling
Horizontal Drilling has opened new resources and significantly improved productivity.
Rocks on Mars
Rocks on Mars Many of the rocks found on Mars are not very different from Earth rocks.
Chalk
Chalk is a variety of limestone formed from fine-grained marine sediment known as ooze.
Fire Opal
Fire Opal is a transparent to translucent opal with a yellow, orange or red background color.
Debris Flows
Debris Flows are moving masses of loose mud, sand, soil, rock and water.
Largest Volcanoes
Largest Volcano - That title is shared by Tamu Massif, Mauna Kea and Ojos del Salado.
Uses of Marble
The Uses of Marble are numerous and diverse. You will be surprised by how it is used.
Storm Surge
Storm Surge can be the most damaging and deadly aspect of a hurricane.
Pyroxene Minerals
Pyroxene Minerals are a group of chain silicate minerals found in igneous and metamorphic rocks.