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Peninsula Gem & Geology Society Web Links To submit suggested links for us to add to this page, please use the form on the Contact page. American Federation of Mineralogical Societies California Federation of Mineralogical Societies Contra Costa Mineral & Gem Society Fossil News Magazine Mount Diablo Interpretive Association Peninsula Geological Society Salinas Valley Rock and Gem Club San Francisco Gem & Mineral Society Santa Clara Valley Gem and Mineral Society Rock and Mineral Society of Hawaii U.S. Geological Survey BLM Geo Communicator maps, mining claims, etc. American Lands Access Association Bureau of Land Management California State Office Article about Krotite mineral found in meteorite