|Ruby and Sapphire
Ruby and Sapphire are the 2nd and 3rd most popular colored stones in the United States.
||Gems from Space
Extraterrestrial Gems A number of materials from space are used as attractive gems.
Emerald is the most popular green gemstone in the United States and most of the world.
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.
100+ Gems - Photos of over 100 beautiful gems ranging from the popular to the obscure.
Strontium Titanate is a man-made diamond simulant with a fire much stronger than diamond.
Turquoise A blue to bluish- green gem material that has been used for over 6000 years.
|Maw Sit Sit
Maw Sit Sit is a metamorphic rock and a gem material that was once thought be jade.
Tanzanite was unknown until a few decades ago but it has erupted into wide popularity.
Labradorite is a feldspar gem that can produce bright flashes of iridescent color.
Gemstones of the World : A book by Robert Schumann. Over one million copies sold.
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.
||Ant Hill Garnets
Ant Hill Garnets are tiny garnets that ants haul to the surface and discard on their anthill. Honest!
||US Diamond Mines
US Diamond Mines Where are diamonds mined in the United States?
Blood Diamonds Illegally-traded diamonds that may have been stolen or used to fund conflict.
United States Gemstones Small mines in the U.S. produce a diversity of gemstones.
||Ruby and Sapphire
Ruby & Sapphire are gem corundums - ruby when red, sapphire when other colors.
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.
||What Is Jade?
Jade has been used as a gemstone and a tool-making material for for 1000s of years.
Benitoite Benitoite: Discovery and geology of the State Gem of California - USGS report from 1911.
Organic Gems are gems formed from or by plants or animals. They might also be fossils.
Garnet is best known as a red gemstone. It occurs in any color and has many industrial uses.
Petrified Wood is a fossilized wood that often serves as a colorful gem material.
Fire Opal is a transparent to translucent opal with a yellow, orange or red background color.
Blue Gemstones - Most people shopping for a colored stone are looking for something blue.
|Amazing Agate Photos
Beautiful Agates A gallery of spectacular agate photos and descriptions by Richard Weston.
Fee Mining sites are mines that you can enter, pay a fee, and keep anything that you find.
Spinel The gemstone that was confused with ruby and sapphire for over 1000 years.
Bloodstone is a dark green jasper with a splatter of red color that looks like blood.
Star Garnets are found in only a few locations worldwide. They are the state gems of Idaho.
Gem Silica is a blue chalcedony colored by copper. It is the rarest and most valuable chalcedony.
Rock Tumblers are machines that slowly turn rough rock into beautiful gemstones.
Sunstone A feldspar with aventurescence caused by tiny copper inclusions.
Green Gemstones - emerald, peridot, jade, tsavorite, chrome diopside, chrysoprase, and more.
Diamonds Do Not Form From Coal Learn several reasons why the coal origin is false.
Rhodonite is a pink manganese silicate used as a gemstone, an ornamental stone and an ore.
Rose Quartz is the name used for specimens of translucent quartz with a pink color.
Malachite has served as a gem material, pigment and ore of copper for thousands of years.
Ametrine is a bicolor quartz (amethyst + citrine) and a gemstone of growing popularity.
Cabochons A photo gallery of cabochon gemstones from around the world.
You Can Be A Diamond Miner! At the Crater of Diamonds mine you can keep what you find.
Jet is a black organic gem material that forms from well-preserved woody material.
Aventurine is translucent quartz with tiny reflective inclusions that produce aventurescence.
Spodumene is an ore of lithium and the mineral of the gems kunzite and hiddenite.
||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.
Smoky Quartz - A brown color-variety of the mineral quartz often cut as a gem.
Rhodochrosite : a manganese mineral used as an ore, a pink gem and an ornamental stone.
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.
Zoisite is a diverse gem. Tanzanite, thulite and anyolite are three of its gem varieties.
Chrysoberyl an extreme gem. Its hardness is 8.5, can display chatoyance or color-change.
||US Gem Production
U.S. Gemstone Production is very low compared to the U.S. being the largest consumer.
Iolite is the gem variety of the mineral cordierite. An alternative to sapphire and tanzanite.
Synthetic Diamonds of spectacular quality are now being produced in labs.
Chatoyant Gems look like the eye of a cat. They have a line of light that moves across the gem.
Helenite is a man-made glass produced by fusing ash from the 1980 Mount St. Helens eruption.
Azurmalachite is a mixture of malachite and azurite. It can be a beautiful blue and green gem.
Andalusite is a gem that exhibits strong pleochroism and often has sets of oriented inclusions.
Peanut Wood? Yes! It is a very interesting gem material found in Western Australia.
Diamonds are mined in many countries and their relative importance changes frequently.
K2 Granite is a white granite with blue orbs of azurite. It is a new gem material from Pakistan.
Petrified Palm is often confused with petrified wood, but it is a distinctly different material.
||Polka Dot Agate
Polka Dot Agate is a translucent blue to white agate with a suspension of colorful dots.
Turritella Agate is a brown agate containing snail fossils from the Green River Formation.