What Is Jade? Learn about the uses of jade. It has been used to make ornaments and tools for thousands of years..
Blood Diamonds
Blood Diamonds: They are illegally-traded diamonds. Learn about them and how the practice can be stopped.
Diamonds from Coal?
Diamonds from Coal? They form under several conditions that rarely involve coal.
Diamond: The Mineral
Diamond: Learn about the properties of diamonds and their many uses. Diamonds are much more than jewelry!
Synthetic Diamonds
Synthetic Diamonds: Large, nearly-flawless diamonds are now possible with chemical vapor deposition.
Ametrine Gemstones
Ametrine The Bicolor Amethyst Ametrine is the name used when a single crystal of quartz has zones of gemstone quality amethyst (purple) and gemstone quality citrine (golden) in contact with one another.
Diamond Producers
Where are Diamonds Mined? Diamonds are produced by many different countries. Learn which ones are the leaders now.
Opal Photos
Pictures of Opal: See the difference between precious opal and common opal. Images of white opal, black opal, fire opal, boulder opal and more are shown in the collection.
