More resources

For more information on gemstones and jewelry in general, these are some on-line resources that are available and valuable:

• American Gem Trade Association (AGTA)
  http://www.agta.org/

• Gemological Institute of America (GIA)
  https://www.gia.edu/

• The Gemmological Association of Great Britain (Gem-A)
  https://gem-a.com/

• The World Jewellery Confederation (CIBJO)
  http://www.cibjo.org/

• Jewelers Vigilance Committee (JVC)
  https://www.jvclegal.org/

• American Gem Society (AGS)
  https://www.americangemsociety.org/en/

• U.S. Federal Trade Commission
  https://www.ftc.gov/

• OECD Due Diligence Guidance for Responsible Supply Chains of Minerals
  from Conflict Affected & High Risk Areas
  http://www.oecd.org/corporate/mne/mining.htm

• UNICRI - United Nations Inter-regional Crime & Justice Research Institute
  http://www.unicri.it/

• The Jewelers Board of Trade®
  http://www.jewelersboard.com/

• Jewelers Circle
  https://jewelerscircle.com/

• Gembridge
  https://gembridge.com/