Links

American Gem Society
http://www.americangemsociety.org/

National Association of Jewelry Appraisers
http://www.najaappraisers.com/

New England Gemological Laboratory
http://www.negemlab.com/

Nice Ice
http://www.niceice.com/

Pala Gems
http://www.palagems.com/

Price Scope
http://www.pricescope.com/