Geology
- 401
- North Jeffco Gem and Mineral Club, Arvada, Colorado
- Purpose is to promote the Earth Sciences through programs at our monthly meetings. Members enjoy rockhounding (rocks, minerals and fossils).
- 402
- San Francisco Gem and Mineral Society
- This California society has monthly meetings, and a newsletter to promote the lapidary arts.
- 403
- Santa Clara Valley Gem and Mineral Society
- This club centered in the south end of the San Francisco bay, features online copies of monthly newsletters, that highlight the monthly meetings, speakers, field trips, study groups, and a yearly "Rock and Gem" show.
- 404
- Santa Cruz Mineral and Gem Society
- This California society was organized 1949, to promote the study and collecting of minerals and gemstones, with monthly meetings, a newsletter, field trips, a rock shop, and an annual show.
- 406
- South Bay Lapidary and Mineral Society
- The Torrance, California society with monthly meetings and field trips for rockhounds, lapidary enthusiasts, and those interested in geology.
- 407
- Tuscarora Lapidary Society's Gemarama
- Tuscarora Lapidary Society, a club outside of Philadelphia, PA offers classes in the lapidary skills. The club also hosts a large annual gem show with exhibits, dealers, and demonstrations.
- 408
- Mineralogical Society of America
- MSA Online: New Interactive Content and Programming offered by the Mineralogical Society of America.
- 409
- California Federation of Mineralogical Societies
- A federation of California (and a few in Arizona, Nevada, and Hawaii) gem and mineral societies, with on-line monthly newsletters, links to member societies and current rockhound topics.
- 410
- Midwest Federation of Mineralogical & Geological Societies
- covering the Midwestern states of Illinois, Indiana, Iowa, Michigan, Minnesota, Missouri, Ohio, and Wisconsin, the western parts of North and South Dakota, and Nebraska, and parts of Arkansas. The federation has a monthly newsletter, and maintains a calendar of events of member society shows.
- 411
- Rocky Mountain Federation of Mineralogical Societies
- Regional federation of amateur enthusiasts in gems, minerals, fossils and the lapidary arts covering Arizona, Arkansas, Colorado, Kansas, Nebraska, New Mexico, North Dakota, Oklahoma, South Dakota, Texas, Utah and Wyoming.
- 412
- South Central Federation of Mineral Societies
- a federation of over 40 clubs and societies covering Arkansas, Louisiana and Texas; organized since 1943
- 413
- The Australian Mineral Collector
- an informal collection of six Australian mineralogical societies not connected by any formal constitution or agreement, the societies form a loose union which bonds their members together by common ideals and interests.
- 414
- Site of the GCSSEPM Foundation and Section
- Gulf-coast regional branch of SEPM, an international non-profit professional organization disseminating geological information.
- 416
- British Antarctic Survey (BAS)
- Is responsible for almost all of the British Government's scientific research in the Antarctic, South Georgia, and the South Sandwich Islands.
- 417
- Czech Geological Survey
- Creates regional geological and thematic maps in different scales for the territory of the Czech Republic and researches the region's complex geological, geochemical and hydrogeological environments.
- 418
- EuroGeoSurveys
- Association of the European Geological Surveys providing neutral, balanced and practical pan-European advice and information on applications of the geosciences. Includes news, events, research programs and international activities.