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USGS information on collecting rocks.
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Gateway to information on minerals and mineral resources research in the eastern United States.
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GeMin exhibition and online copipes of the Oryktologia NEA news.
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Pictures, links, and a brief description of the properties and applications of this siliceous rock.
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Professor in the Department of Geology at Miami University, Oxford, OH. Includes information on Dr. Rakovan's research and teaching in mineralogy and geochemistry.
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A collection of material relating to salt [NaCl] and its influence on civilization. Includes sections on physiology, geology, archeology, palaeoclimatology, palaeogeography, production, religion, economics, and etymiology of salt.
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Geological display of images and information including crystals, minerals and gems.
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Contains over 100 pictures of minerals, rocks and fossils, as well as information about classification, identification, the Science Olympiad Rocks and Minerals event and related topics.
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Personal collection of minerals from California, Arizona, Nevada and almost all the rest of the United States.
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high-resolution pictures of rocks and minerals, taken from personal collections, as well as the Calvin College Geology Department, Michigan, USA.
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