Other
Bell Laboratories: Colloids
This site is provided by Bell Laboratories, and is devoted to the mixture known as Colloids. The site is broken down into 4 areas: an intro, what it is, breakthrough, and application section. The site contains pictures and provides many...
Jewelry Central
Jewelry Central: Opal
This page contains information about the opal, including the gemstone's historical importance and physical properties.
Jewelry Central
Jewelry Central: Gemstones
This commercial site contains general information on various synthetic and natural gemstones and provides links to specific gems.