Caribbean Gemological Institute
Caribbean jewelers organization includes jewelry, shopping and travel tips..
Fluorescent Minerals under Ultraviolet Light
Descriptions and pictures of different gems and minerals under UV lights.
Gem Hut
Hundreds of descriptions for gems, minerals, and rare metals. Pictures, hardness, and composition.
Gemology Tools
Software for the professional gemologist or gemology student/enthusiast.
Gems and Precious Stones
An on-line gem and jewelry course at UC Berkeley.
Gemstone Forecaster Newsletters
Analyzes Burma ruby and sapphire gems and collector gemstone markets.
National Gemstone
Introduction to collecting and investing in gemstones and colored diamonds, with descriptions of the types most widely traded.
NOVA
Gemstone primer with photos and vital information regarding gemstones.
Photomicrography by Erik Carlson
Photomicrography of diamonds and other gemstones.
Secret Jewelry Collection
A Japanese collector's site of jewelry, minerals and gemstones.
Secrets of the Gem Trade. The Connoisseur's G
A new gem book by by R. W. Wise.
Smithsonian Gem & Mineral Collection
Pictures and short descriptions of gems and minerals found at the Smithsonian.
The Image
Mineral and gemstone galleries. Physical properties and historical facts for minerals and gemstones.
University of Texas Gem Class
Gem and Mineral class at the University of Texas, Austin.