Jewelry Resources:

American Gem Society Laboratories - Preeminent authority in diamond grading; provides grading reports for diamonds of all sizes using their succinct 0 to 10 grading scale.

Color Diamond Encyclopedia - Describes more than 300
natural colors. FTC – How to Buy Jewelry - Federal Trade Commission's facts for consumers; information to help you get the best quality jewelry for the money.

Gemological Institute of America - Authority in gemology, diamond grading, jewelry education, research, diamond and gemstone grading.

Jewelers Board of Trade - Membership organization for manufacturers, designers, retailers and others in the jewelry industry.

Jewelry Information Center - A source for consumer information on fine jewelry.

Mineralogical Society of America - Society for the advancement of mineralogy and crystallography, promoting their use in science, industry, and the arts.

National Association of Jewelry Appraisers - Appraisal association in the US that devotes itself solely to the appraisal of gems and jewelry.