Pearl-Guide.com is an online forum with extensive information about pearls. Perhaps one of the most exhaustive sources of information about pearls and the pearl industry of any online source.
The U.S. Geological Survey offers a brief description of pearls as an offical "gemstone". A "credible" government source but as with many government projects; a bit dry.
EGLUSA (European Gemological Laboratory) and the GIA (Gemlogical Institute of America) both offer gem testing and appraisal services. If you ever wish to have your pearl jewelry evaluated by unbiased experts, these would be two good choices.
Perles de Tahiti is French Polynesia's official website to promote Tahitian "Black" pearls. This is a good source of information about Tahitian pearls.
The South Sea Pearl Consortium is Australia's South Sea pearl industry advocacy organization. This is a good source of information about South Sea pearls.
Below are various commercial sites for your possible interest. (Note: These sites are provided for your possible interest. Mermaid Pearls has not done the research necessary to be able to vouch for the companies presented below.)
Diamond Jewelry "Never settle for anything less than beautiful"
Jewelry Retailer Find the right piece of jewelry at www.jeweler.com
