- Handbook of Mineralogy - thousands of PDFs about minerals
- Crystal Forms - you can print these out, cut, fold, and glue to make your own paper crystals.
- RRUFF - database of Raman spectroscopy , X-ray diffraction, and chemistry of minerals
- National Mine Map Repository - you can request maps of old abandoned mines for free here.
- MRDS - Mineral Resource Data System, where you can get GPS data for mines around the country, down to the county. The data can be exported in several formats, including Google Earth's KML format. That can be converted to a file that you can then import into your handheld GPS for out in the field. There is free software that does this, called GPS Babel. This way you can plan a trip to a certain area, download mine locations to Google Earth, weed out the mines you aren't interested in, save a KML file, and convert it to the file format for your GPS device. Then use your GPS device's software to import the data to your handheld GPS receiver.
- The Vug - including a comprehensive list of upcoming mineral shows
- American Mineralogist (archives) - 1916-1999 are free and 2000 and later are only for subscribers.
- Gemology reference library - International Gem Society (IGS)
- Mining History Association
- Where to Find Rocks
- Gator Girl Rocks
Other Mineral Dealers