GIA’s Gem Encyclopedia is a virtual journey through the science and lore of gemstones from across the globe. Each precious stone page features additional detailed gemological information, a buyer’s guide, photos, videos & research.
Geology.com is one of the world’s leading portals to geology and Earth science news and information for rocks, minerals, gemstones, energy, volcanoes, earthquakes, careers, geologic hazards, and more.
The Handbook of Mineralogy series is a Five Volume set authored by John W. Anthony, Richard A. Bideaux, Kenneth W. Bladh, and Monte C. Nichols, and published by Mineral Data Publishing. Each mineral known at the time of publication occupies one page of the handbook.
Almost all rocks are made of minerals. The exceptions are obsidian (which is made of volcanic glass) and coal (which is made of organic carbon.) Learning the basics of mineral identification is easy. All you need are a few simple tools (like a magnet and a magnifying glass) and your own powers of careful observation.
The Mineral and Gemstone Kingdom is a free informational and educational guide to rocks, minerals, gemstones, and jewelry. This site has been providing detailed information and photos of hundreds of mineral and gemstone since 1997 and is one of the leading education resources on minerals and gemstones.