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