Bob's Rock Shop: The First 'Zine for Mineral Collectors and Rockhounds Bob's Rock Shop is the net's first 'zine for mineral collectors, rockhounds and lapidary hobbyists, now joined online by Rock&Gem magazine. Among the features to browse here the free use, form-accessible 'Rock Trader' classified ads; downloadable freeware and shareware software for rockhounds; the 'Rock Net' online bulletin board; several collections of entertaining and informative mineralogical articles and essays; a collecting site catalog for the United States and Canada; extensive lists of upcoming shows, US clubs, and links to kindred sites. rockhounds.com/
Igenous Rocks Pictures igenous rock minerals rock earth geology.com/rocks/igneous-rocks.shtml
USGS: Ask-A-Geologist Do you have a question about volcanoes, earthquakes, mountains, rocks, maps, ground water, lakes, or rivers? Email your questions. walrus.wr.usgs.gov/ask-a-geologist/