Gemstones: Facts, photos, and information for over 100 gems.
100+ Gems - Photos of over 100 beautiful gems ranging from the popular to the obscure.
Oregon Gemstones: Sunstone, Thundereggs, Opal and More
Oregon is one of the top US states for gemstone production. Sunstone, thundereggs, opal, petrified wood, agates and jasper are a few of Oregon's gems.
Gems from Space! Peridot Moldavite Tektite Desert Glass
People have been fascinated with extraterrestrial gems for over 100 years. They are rare materials with a novelty origin, and many people want them. Moldavite was being made into …
Brown Diamonds: AKA chocolate, champagne and cognac …
When brown diamonds are cut into tiny gems of as little as 0.01 carat, their brown color is barely noticed. Dozens or hundreds of these tiny diamonds are often used in a single piece of jewelry …
Helenite: A man-made colored stone made from volcanic ash
Minerals: Information about ore minerals, gem materials and rock-forming minerals. Volcanoes: Articles about volcanoes, volcanic hazards and eruptions past and present. Gemstones: …
Arizona Gemstones - Turquoise, Peridot, Petrified Wood
Hunt For Gems - Keep What You Find! There are over 100 mines in the United States where anyone can visit, pay a small fee, look for gems and minerals, and keep what they find. For a …
Ruby and Sapphire: Gems of the Mineral Corundum - Geology.com
Most people don't realize that ruby and sapphire are both gems of the mineral corundum. Both of these gemstones have the same chemical composition and the same mineral structure. Trace …
Pictures of Pinfire Opal or Pinpoint Opal - Geology.com
In the area around Erandique, Honduras, numerous basalt flows contain tiny vesicles that have been infilled by precious opal. This produces a matrix opal with a black bodycolor and an …
Agate Gemstones | Beads, Jewelry, Tumbled Stones - Geology.com
Agua Nueva agate: A colorful cabochon cut from Agua Nueva agate, a popular gem material found near Chihuahua, Mexico. Tumbled Agate: Agate is the most popular rough for producing …
Green Gemstones: Emerald, Jade, Peridot and more - Geology.com
There are many green gems. Author: Hobart M. King , PhD, GIA Graduate Gemologist Green Gemstones and Crystals: A stunning collection of green crystals and faceted green gems.