WHAT IS A GEM?

http://www.gemsociety.org/info/igem2.htm

GEMOLOGY:

  The study of gem stones

http://www.gemsociety.org/ Provides quality information and educational services to everyone interested in gemstones.

http://www.gemsociety.org/info/info.htm#gem Gem listings

http://www.tradeshop.com/gems/rainbow.html Familiar stones often used in jewelry and also stones suitable only for collections.

http://www.ganoksin.com/borisat/nenam/physical.htm Introductory Gemology - Definitions Concerning Physical Properties of Gemstones

http://www.ganoksin.com/borisat/nenam/mineral.htm Minerals, Crystals and Their Systems

http://www.ganoksin.com/borisat/nenam/optic1.htm Optical Effects in Gemstones

http://asia-gems.com/other/links.htm A page of links.

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