www.npcg.org - The National Polymer Clay Guild site - for artists who use polymer clay, or anyone who is interested in this versatile material.

www.opalsociety.com - An educational nonprofit organization, the Opal Society shares enthusiasm for and knowledge of opals.

www.craftemergency.org - The Craft Emergency Relief Fund is a nonprofit, tax-exempt organization that provides support to professional craftspeople facing career-threatening emergencies.

www.gemartists.org - The home of the Gem Artists of North America (GANA), this site has information about some of the most innovative gem carvers working today and the organization that represents them.

www.amfed.org - The American Federation of Mineralogical Societies' site offers a complete listing of the different regional federations and clubs, with meeting information and rundowns of rockhounding sites contributed by members.