Here are some sites we find interesting and informational. Feel free to bookmark this page for easy access to this resource. Geological Organizations A list of geological organizations and links to their sites. University of Cambridge Earth Sciences the home page of the Department of Earth Sciences, University of Cambridge. U.S. Geological Survey-Geologic Information USGS scientists uncover the secrets of the deep, including environment, resources, and natural hazards, in the Coastal and Marine Geology Program. Geology Exploring this series of exhibits will take you on a journey through the history of the Earth, with stops at particular points in time to examine the fossil record and stratigraphy. Canadian Institute of Gemology is a Web site dedicated to the fascinating field of gemology. The Gemology Resource Web was created to satisfy a great demand for accurate information which is so strongly needed in the jewelry industry; not only for members of the trade, but also for concerned consumers. American Gem Society Retail jewelers' trade organization. American Gem Trade Association American Gem Trade Association (AGTA), P.O. Box 581043, Dallas, TX 75258-1043 USA, phone (214) 742-4367. Gem dealers trade organization. International Gemmological Institute, Inc. Diamond and colored stone appraisals and courses, diamond repairs.