|Gems from Space
Extraterrestrial Gems A number of materials from space are used as attractive gems.
||Ruby and Sapphire
Ruby and Sapphire are the 2nd and 3rd most popular colored stones in the United States.
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!
Benitoite Benitoite: Discovery and geology of the State Gem of California - USGS report from 1911.
100+ Gems - Photos of over 100 beautiful gems ranging from the popular to the obscure.
United States Gemstones Small mines in the U.S. produce a diversity of gemstones.
||All About Diamonds
Diamond a collection of photos, articles, facts, maps and graphs about diamonds.
Turquoise A blue to bluish- green gem material that has been used for over 6000 years.
Labradorite is a feldspar gem that can produce bright flashes of iridescent color.
Strontium Titanate is a man-made diamond simulant with a fire much stronger than diamond.
Ammolite is a fossil and a gemstone. It is shell material from fossil ammonites.
Tanzanite was unknown until a few decades ago but it has erupted into wide popularity.
||Ant Hill Garnets
Ant Hill Garnets are tiny garnets that ants haul to the surface and discard on their anthill. Honest!
Gemstones of the World : A book by Robert Schumann. Over one million copies sold.
Fee Mining sites are mines that you can enter, pay a fee, and keep anything that you find.
Topaz is a popular birthstone and the #8 mineral in the Mohs Hardness Scale.
||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.
Petrified Wood is a fossilized wood that often serves as a colorful gem material.
|What Is Jade?
Jade has been used as a gemstone and a tool-making material for for 1000s of years.
Blood Diamonds Illegally-traded diamonds that may have been stolen or used to fund conflict.
Bloodstone is a dark green jasper with a splatter of red color that looks like blood.
||Amazing Agate Photos
Beautiful Agates A gallery of spectacular agate photos and descriptions by Richard Weston.
Organic Gems are gems formed from or by plants or animals. They might also be fossils.
Sunstone A feldspar with aventurescence caused by tiny copper inclusions.
||US Diamond Mines
US Diamond Mines Where are diamonds mined in the United States?
Peridot is the gem variety of olivine. Derived from the mantle and rarely from meteorites.
Aventurine is translucent quartz with tiny reflective inclusions that produce aventurescence.
Garnet is best known as a red gemstone. It occurs in any color and has many industrial uses.
Spinel The gemstone that was confused with ruby and sapphire for over 1000 years.
Cabochons A photo gallery of cabochon gemstones from around the world.
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.
Rose Quartz is the name used for specimens of translucent quartz with a pink color.
Diamonds Do Not Form From Coal Learn several reasons why the coal origin is false.
Jet is a black organic gem material that forms from well-preserved woody material.
Smoky Quartz - A brown color-variety of the mineral quartz often cut as a gem.
You Can Be A Diamond Miner! At the Crater of Diamonds mine you can keep what you find.
Ametrine is a bicolor quartz (amethyst + citrine) and a gemstone of growing popularity.
Rock Tumblers are machines that slowly turn rough rock into beautiful gemstones.
Spodumene is an ore of lithium and the mineral of the gems kunzite and hiddenite.
Malachite has served as a gem material, pigment and ore of copper for thousands of years.
Kyanite is a metamorphic mineral that sometimes has a gemmy transparent blue color.
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.
Iris Agate can produce a rainbow of colors when light passes between its thin bands.
Scapolite can be a pretty faceted stone or a translucent cab with cats eye and iris effects.
|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.
Rhodonite is a pink manganese silicate used as a gemstone, an ornamental stone and an ore.
Azurmalachite is a mixture of malachite and azurite. It can be a beautiful blue and green gem.
|Facts About Diamonds
Facts About Diamonds You are a diamond expert if you know all of these!
Diamonds are mined in many countries and their relative importance changes frequently.
Helenite is a man-made glass produced by fusing ash from the 1980 Mount St. Helens eruption.
Rhodochrosite : a manganese mineral used as an ore, a pink gem and an ornamental stone.
|Polka Dot Agate
Polka Dot Agate is a translucent blue to white agate with a suspension of colorful dots.
Chatoyant Gems look like the eye of a cat. They have a line of light that moves across the gem.
K2 Granite is a white granite with blue orbs of azurite. It is a new gem material from Pakistan.
Synthetic Diamonds of spectacular quality are now being produced in labs.
Andalusite is a gem that exhibits strong pleochroism and often has sets of oriented inclusions.
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.
Turritella Agate is a brown agate containing snail fossils from the Green River Formation.