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100+ Gemsgem photos 100+ Gems - Photos of over 100 beautiful gems ranging from the popular to the obscure. PrasiolitePrasiolite Prasiolite is amethyst that has been heat-treated to a leek-green color. Ruby and SapphireRuby and Sapphire Ruby and Sapphire are the 2nd and 3rd most popular colored stones in the United States. Opal PhotosOpal Pictures of Opal A collection of different types of opal from all around the world and Mars too!
All About DiamondsDiamond Diamond A collection of photos, articles, facts, maps and graphs about diamonds. Emeraldemerald Emerald is the most popular green gemstone in the United States and most of the world. Gemstone BookGemstones of the World Gemstones of the World : A book by Robert Schumann. Over one million copies sold. AmethystAmethyst Amethyst - the most popular purple gem. It has a beautiful color and reasonable price.
LabradoriteLabradorite Labradorite is a feldspar gem that can produce bright flashes of iridescent color. Geology of GemsGeology of Gems Geology of Gems - The first comprehensive book on the geology of gem deposits. TopazTopaz Topaz is a popular birthstone and the #8 mineral in the Mohs Hardness Scale. Blue Gemstonesblue gemstones Blue Gemstones - Most people shopping for a colored stone are looking for something blue.
Tanzanitetanzanite Tanzanite was unknown until a few decades ago but it has erupted into wide popularity. TurquoiseTurquoise Turquoise A blue to bluish- green gem material that has been used for over 6000 years. AmmoliteAmmolite Ammolite is a fossil and a gemstone. It is shell material from fossil ammonites. Green GemstonesGreen Gemstones Green Gemstones - emerald, peridot, jade, tsavorite, chrome diopside, chrysoprase, more.
Ant Hill GarnetsAnt Hill Garnets Ant Hill Garnets - tiny gems that ants haul to the surface and discard on their anthill. Honest! Blood DiamondsBlood Diamonds Blood Diamonds Illegally-traded diamonds that may have been stolen or used to fund conflict. PeridotPeridot Peridot is the gem variety of olivine. Derived from the mantle and rarely from meteorites. Strontium Titanatestrontium titanate Strontium Titanate - lab created diamond simulant with fire much stronger than diamond.
What Is Jade?Jade Jade has been used as a gemstone and a tool-making material for for 1000s of years. U.S. GemstonesU.S. Gemstones United States Gemstones Small mines in the U.S. produce a diversity of gemstones. Ruby and SapphireRuby and Sapphire Ruby & Sapphire are gem corundums - ruby when red, sapphire when other colors. ZirconZircon Zircon is a popular and colorful gem with fire and brightness that rivals diamond.
Tumbled StonesTumbled Stones Tumbled Stones are rocks that have been rounded, smoothed and polished in a rock tumbler. Lapis Lazulilapis lazuli Lapis Lazuli - a metamorphic rock and the most popular blue opaque gemstone in history. SunstoneSunstone Sunstone A feldspar with aventurescence caused by tiny copper inclusions. TourmalineTourmaline Tourmaline - the most colorful mineral and natural gem material on Earth.
Gems from SpaceGems from Space Extraterrestrial Gems A number of materials from space are used as attractive gems. GarnetGarnet Garnet is best known as a red gemstone. It occurs in any color and has many industrial uses. SpinelSpinel Spinel The gemstone that was confused with ruby and sapphire for over 1000 years. Gem SilicaGem Silica Gem Silica is a blue chalcedony colored by copper. It is the rarest and most valuable chalcedony.
MalachiteMalachite Malachite has served as a gem material, pigment and ore of copper for thousands of years. Star GarnetStar Garnet Star Garnets are found in only a few locations worldwide. They are the state gems of Idaho. Fire OpalFire Opal Fire Opal is a transparent to translucent opal with a yellow, orange or red background color. Rose QuartzRose Quartz Rose Quartz is the name used for specimens of translucent quartz with a pink color.
AventurineAventurine Aventurine - a translucent quartz with reflective inclusions that cause aventurescence. Jetjet Jet is a black organic gem material that forms from well-preserved woody material. Organic GemsOrganic Gems Organic Gems are gems formed from plant or animal materials. Azurmalachiteazurmalachite Azurmalachite is a mixture of malachite and azurite. It can be a beautiful blue and green gem.
Red BerylRed Beryl Red Beryl is one of the rarest gems. Small amounts are mined at one locality in Utah. CabochonsCabochons Cabochons A photo gallery of cabochon gemstones from around the world. Arkansas DiamondsArkansas Diamonds You Can Be A Diamond Miner! At the Crater of Diamonds mine you can keep what you find. Kyanitekyanite Kyanite is a metamorphic mineral used to make porcelain, abrasive products and gems.
Gem BerylGem Beryl Beryl - the mineral of emerald, aquamarine, morganite, heliodor, goshenite, and more. Bloodstonebloodstone Bloodstone is a dark green jasper with a splatter of red color that looks like blood. RhodochrositeRhodochrosite Rhodochrosite : a manganese mineral used as an ore, a pink gem and an ornamental stone. AmetrineAmetrine Ametrine is a bicolor quartz (amethyst + citrine) and a gemstone of growing popularity.
IoliteIolite Iolite is the gem variety of the mineral cordierite. An alternative to sapphire and tanzanite. Petrified WoodPetrified Wood Petrified Wood is a fossilized wood that often serves as a colorful gem material. US Diamond MinesUnited States Diamond Mines US Diamond Mines Where are diamonds mined in the United States? BenitoiteBenitoite Benitoite - Geology of the State Gem of California - USGS report from 1911.
ChrysopraseChrysoprase Chrysoprase - The translucent green variety of chalcedony that is colored by nickel. Gem MineralsGem Mineral Collections Gem Mineral Collections are a great way to learn about gem materials. Get yours. Chrysoberylchrysoberyl Chrysoberyl an extreme gem. Its hardness is 8.5, can display chatoyance or color-change. Amazing Agate PhotosAgates Beautiful Agates A gallery of spectacular agate photos and descriptions by Richard Weston.
Zoisitezoisite Zoisite is a diverse gem. Tanzanite, thulite and anyolite are three of its gem varieties. Rock Tumblingrock tumblers Rock Tumblers - All about rock tumblers and rock tumbling. Read before you buy a tumbler. DiopsideChrome Diopside Chrome Diopside is a green gemstone that is often used as an alternative stone for emerald. Fancy SapphireFancy Sapphires Fancy Sapphires are gem corundums of any color other than red, blue or colorless.
Biggest MisconceptionDiamonds from Coal Diamonds Do Not Form From Coal Learn several reasons why the coal origin is false. Rhodoniterhodonite Rhodonite is a pink manganese silicate used as a gemstone, an ornamental stone and an ore. Smoky QuartzSmoky quartz Smoky Quartz - A brown color-variety of the mineral quartz often cut as a gem. US Gem ProductionUS Gemstone Production U.S. Gemstone Production is very low compared to the U.S. being the largest consumer.
ScapoliteScapolite Scapolite can be a pretty faceted stone or a translucent cab with cats-eye effects. AzuriteAzurite Azurite is a vivid blue copper mineral that can be cut into beautiful cabochon gems. Brown DiamondsBrown Diamonds Brown Diamonds are growing in popularity and are frequently seen in fashion jewelry. ApatiteApatite Apatite produces gemstones with vivid colors and is popular with collectors.
HeliodorHeliodor Heliodor is a yellow, greenish-yellow or golden yellow beryl used as a gem. Synthetic DiamondsSynthetic Diamonds Synthetic Diamonds of spectacular quality are now being produced in labs. SpodumeneSpodumene Spodumene is an ore of lithium and the mineral of the gems kunzite and hiddenite. Iris AgateIris Agate Iris Agate can produce a rainbow of colors when light passes between its thin bands.
Facts About DiamondsDiamond Facts Facts About Diamonds You are a diamond expert if you know all of these! Chatoyant Gemscats eye gems Chatoyant Gems look like the eye of a cat. They have a line of light that moves across the gem. AndalusiteAndalusite Andalusite - exhibits strong pleochroism and often has sets of oriented inclusions. SerpentineSerpentine Serpentine - a group of metamorphic minerals used as gems and architectural stone.
UnakiteUnakite Unakite A gem material composed of green epidote and pink orthoclase. Titanite aka SpheneTitanite Titanite is also known as sphene. It is a minor source of titanium and a minor gem. HeleniteHelenite Helenite is a man-made glass produced by fusing ash from the 1980 Mount St. Helens eruption. Maw Sit SitMaw Sit Sit Maw Sit Sit is a metamorphic rock and a gem material that was once thought be jade.
Turritella AgateTurritella Agate Turritella Agate is a brown agate containing snail fossils from the Green River Formation. Polka Dot AgatePolka Dot Agate Polka Dot Agate - a translucent blue to white agate with a suspension of colorful dots. Diamond ProducersDiamond Producers Diamonds are mined in many countries and their relative importance changes frequently. K2 GraniteK2 Granite - aka K2 Jasper K2 Granite is a white granite with blue orbs of azurite. It is a new gem material from Pakistan.
Hardness PicksHardness Picks Hardness Picks - Mohs hardness testing with precise and easy-to-use hardness picks. Canadian DiamondsCanadian Diamonds Canadian Diamond Mines produce some of the largest and highest quality diamonds! Petrified PalmPetrified Palm Petrified Palm is often confused with petrified wood. It is a distinctly different material. Tumbled StonesTumbled Gemstones 50+ Different Tumbled Stones for sale at RockTumbler.com. (affiliated with geology.com)
Geology ToolsGeology Tools Geology Tools - Rock hammers, field bags, hand lenses, maps, hardness picks, gold pans. Peanut Wood?Peanut Wood Peanut Wood? Yes! It is a very interesting gem material found in Western Australia. SemipreciousSemiprecious vs. Precious Semiprecious vs. Precious - What is the difference between these two types of stones? Fee MiningFee Mining Fee Mining sites are mines that you can enter, pay a fee, and keep anything that you find.
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