American Gem Society  trade organization links to AGS stores.

Gemological Institute of America  foremost authority on gemology and research.

International Gemological Institute gem lab.

Gubelin Gem Lab foremost European research and gem lab.

European Gemological Laboratory USA gem lab.

Kitco daily metal pricing.

Rio Grande tools for jewelry work.

Patek Philippe fine watches.

Tag Heuer sports watches.

Butterfields west coast auction house and appraisers.

Old World Jewelers antique and watch house.

Your Gemologist British based gemologist with tons of information about gemstones.

James Ou A friend in China

Jeweler Central Jeweler Central - A Comprehensive Directory of Jewelers Nationwide

Jewelry - Home of the Internet's best jewelry resources, find out everything you want to know about jewelry.