100+ Gems - Photos of over 100 beautiful gems ranging from the popular to the obscure.
||Gems from Space
Extraterrestrial Gems A number of materials from space are used as attractive gems.
Blue Gemstones - Most people shopping for a colored stone are looking for something blue.
||Ruby and Sapphire
Ruby and Sapphire are the 2nd and 3rd most popular colored stones in the United States.
Pictures of Opal A collection of different types of opal from all around the world and Mars too!
||All About Diamonds
Diamond A collection of photos, articles, facts, maps and graphs about diamonds.
Green Gemstones - emerald, peridot, jade, tsavorite, chrome diopside, chrysoprase, more.
Labradorite is a feldspar gem that can produce bright flashes of iridescent color.
Emerald is the most popular green gemstone in the United States and most of the world.
Tanzanite was unknown until a few decades ago but it has erupted into wide popularity.
United States Gemstones Small mines in the U.S. produce a diversity of gemstones.
Turquoise A blue to bluish- green gem material that has been used for over 6000 years.
Ammolite is a fossil and a gemstone. It is shell material from fossil ammonites.
Gem Mineral Collections are a great way to learn about gem materials. Get yours.
||Geology of Gems
Geology of Gems - The first comprehensive book on the geology of gem deposits.
Topaz is a popular birthstone and the #8 mineral in the Mohs Hardness Scale.
Strontium Titanate - lab created diamond simulant with fire much stronger than diamond.
Gemstones of the World : A book by Robert Schumann. Over one million copies sold.
||Ant Hill Garnets
Ant Hill Garnets are tiny garnets that ants haul to the surface and discard on their anthill. Honest!
||Ruby and Sapphire
Ruby & Sapphire are gem corundums - ruby when red, sapphire when other colors.
Spinel The gemstone that was confused with ruby and sapphire for over 1000 years.
||What Is Jade?
Jade has been used as a gemstone and a tool-making material for for 1000s of years.
Rock Tumblers - All about rock tumblers and rock tumbling. Read before you buy a tumbler.
Blood Diamonds Illegally-traded diamonds that may have been stolen or used to fund conflict.
Lapis Lazuli - a metamorphic rock and the most popular blue opaque gemstone in history.
Peridot is the gem variety of olivine. Derived from the mantle and rarely from meteorites.
Jet is a black organic gem material that forms from well-preserved woody material.
Fee Mining sites are mines that you can enter, pay a fee, and keep anything that you find.
Fire Opal is a transparent to translucent opal with a yellow, orange or red background color.
Star Garnets are found in only a few locations worldwide. They are the state gems of Idaho.
Garnet is best known as a red gemstone. It occurs in any color and has many industrial uses.
Sunstone A feldspar with aventurescence caused by tiny copper inclusions.
Ametrine is a bicolor quartz (amethyst + citrine) and a gemstone of growing popularity.
Gem Silica is a blue chalcedony colored by copper. It is the rarest and most valuable chalcedony.
Red Beryl is one of the rarest gems. Small amounts are mined at one locality in Utah.
Malachite has served as a gem material, pigment and ore of copper for thousands of years.
Azurmalachite is a mixture of malachite and azurite. It can be a beautiful blue and green gem.
Rose Quartz is the name used for specimens of translucent quartz with a pink color.
You Can Be A Diamond Miner! At the Crater of Diamonds mine you can keep what you find.
Aventurine is translucent quartz with tiny reflective inclusions that produce aventurescence.
Petrified Wood is a fossilized wood that often serves as a colorful gem material.
Organic Gems are gems formed from or by plants or animals. They might also be fossils.
||US Diamond Mines
US Diamond Mines Where are diamonds mined in the United States?
Rhodochrosite : a manganese mineral used as an ore, a pink gem and an ornamental stone.
Chrysoprase - The translucent green variety of chalcedony that is colored by nickel.
Bloodstone is a dark green jasper with a splatter of red color that looks like blood.
Diamonds Do Not Form From Coal Learn several reasons why the coal origin is false.
Beryl - the mineral of emerald, aquamarine, morganite, heliodor, goshenite, and more.
Benitoite - Geology of the State Gem of California - USGS report from 1911.
Kyanite is a metamorphic mineral that sometimes has a gemmy transparent blue color.
Scapolite can be a pretty faceted stone or a translucent cab with cats eye and iris effects.
Cabochons A photo gallery of cabochon gemstones from around the world.
|Amazing Agate Photos
Beautiful Agates A gallery of spectacular agate photos and descriptions by Richard Weston.
Synthetic Diamonds of spectacular quality are now being produced in labs.
||Facts About Diamonds
Facts About Diamonds You are a diamond expert if you know all of these!
Iris Agate can produce a rainbow of colors when light passes between its thin bands.
Zoisite is a diverse gem. Tanzanite, thulite and anyolite are three of its gem varieties.
Fancy Sapphires are gem corundums of any color other than red, blue or colorless.
Spodumene is an ore of lithium and the mineral of the gems kunzite and hiddenite.
||Polka Dot Agate
Polka Dot Agate is a translucent blue to white agate with a suspension of colorful dots.
Serpentine - a group of metamorphic minerals used as gems and architectural stone.
Rhodonite is a pink manganese silicate used as a gemstone, an ornamental stone and an ore.
Iolite is the gem variety of the mineral cordierite. An alternative to sapphire and tanzanite.
Heliodor is a yellow, greenish-yellow or golden yellow beryl used as a gem.
|US Gem Production
U.S. Gemstone Production is very low compared to the U.S. being the largest consumer.
Azurite is a vivid blue copper mineral that can be cut into beautiful cabochon gems.
Smoky Quartz - A brown color-variety of the mineral quartz often cut as a gem.
Chatoyant Gems look like the eye of a cat. They have a line of light that moves across the gem.
Canadian Diamond Mines produce some of the largest and highest quality diamonds!
Andalusite is a gem that exhibits strong pleochroism and often has sets of oriented inclusions.
Diamonds are mined in many countries and their relative importance changes frequently.
Unakite A gem material composed of green epidote and pink orthoclase.
Helenite is a man-made glass produced by fusing ash from the 1980 Mount St. Helens eruption.
Chrome Diopside is a green gemstone that is often used as an alternative stone for emerald.
Petrified Palm is often confused with petrified wood, but it is a distinctly different material.
Peanut Wood? Yes! It is a very interesting gem material found in Western Australia.
Hardness Picks - Mohs hardness testing with precise and easy-to-use hardness picks.
Turritella Agate is a brown agate containing snail fossils from the Green River Formation.
Chrysoberyl an extreme gem. Its hardness is 8.5, can display chatoyance or color-change.
K2 Granite is a white granite with blue orbs of azurite. It is a new gem material from Pakistan.
|Maw Sit Sit
Maw Sit Sit is a metamorphic rock and a gem material that was once thought be jade.
||Titanite aka Sphene
Titanite - also known as sphene, this mineral is a minor source of titanium and a minor gem.
Apatite produces gemstones with vivid colors and is popular with collectors.
Prasiolite is amethyst that has been heat-treated to a leek-green color.