• Arts: Crafts: Jewelry: Gemstones  (3)
• Business: Construction and Maintenance: Materials and Supplies: Masonry and Stone: Natural Stone  (453)
• Shopping: Recreation: Science and Nature  (349)

This category in other languages:
	Catalan  (4)   Czech  (17)   Dutch  (5)   French  (58)   German  (44)   Italian  (9)   Spanish  (13)

• Collecting Rocks - USGS information on collecting rocks.
• Eastern (USA) Minerals Resources - Gateway to information on minerals and mineral resources research in the eastern United States.
• GeMin Exhibition - GeMin exhibition and online copipes of the Oryktologia NEA news.
• Minerals of the United States - Click on the map to view pictures of minerals found in the chosen state.
• Perlite - Pictures, links, and a brief description of the properties and applications of this siliceous rock.
• Rakovan, John - Professor in the Department of Geology at Miami University, Oxford, OH. Includes information on Dr. Rakovan's research and teaching in mineralogy and geochemistry.
• The Rock Gallery - Geological display of images and information including crystals, minerals and gems.
• The Rock, Mineral, and Fossil Reference - 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.
• Salt (MRBloch Archive) - 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.
• YupRocks - high-resolution pictures of rocks and minerals, taken from personal collections, as well as the Calvin College Geology Department, Michigan, USA.