These are links extracted from my bookmark file that I have found useful in the past. While they are not complete or comprehensive with respect to geology or mineralogy, you should be able to find what you want by browsing around.

Geology Stuff

• American Geological Institute 
• Chevron Corporation Welcome Page 
• CLI International, Inc. 
• COGS- The Computer Oriented Geological Society 
• Digital Line Graph (DLG) instructions for downloading digital cultural data from the USGS Geo Data servers. This is a article appeared in the October, 1996 issue of the Houston Geological Bulletin.
• Discovery Place - The Petroleum Industry's On-Line Resource Centre 
• Geobyte Home Page is the American Association of Petroleum Geologists (AAPG) web site.
• GeoGraphix Computer Systems  PC Mapping software popular with Oil and Gas companies.
• GRI/NetPrototype v0.6  Gas Research Institute
• Houston Geological Society  Local professional society for petroleum and environmental geologists.
• Information Services at the University of Tulsa  Petroleum / Oil & Gas Links
• Neopolis Oil Patch  Local Houston ISP provider with Oil and Gas links.
• OTHER GEOSCIENCE RELATED SERVERS 
• Petroleum Technology Transfer Council 
• Resume of David A. Barthelmy
• Sci.geo.petroleum Internet Resources  Scott Guthery's extensive listing of petroleum related links.
• SDSU Department of Geological Sciences  San Diego State University
• SPWLA Home Page  Society of Professional Well Log Analysts.
• The Bureau of Economic Geology 
• USGS Geo Data  United States Geological Survey digital mapping data.

Mineralogy Stuff

• Alphabetical Mineral Reference from the University of Wisconsin mineral database.
• American Mineralogist Home Page 
• ATHENA MINERALOGY presents Pierre Perroud's searchable database. This sit contains mineral name, formula, and systematic listings of all known species.
• Bob's Rock Shop contains software and data for MinDat32 (Joycon Ralph) and MinDB (Mike McCormick).
• GEOLIB is a Mineralogical database that contains all minerals approved by the IMA, mineral systematics, literature references, variant names, and a cataloging system for your collection, with automatic reference to mineral.
• IUMSC Data Server Indiana University Molecular Structure Center. Their Java programming efforts for crystallography and molecular models is quite informative. See GEOLIB for similar efforts in Java programming.
• Lapis is a german-language Mineral Magazine devoted to mineralogy. Paleoart is providing english abstracts of selected articles from this magazine as a courtesy to english-speaking mineral enthusiasts.
• Le Regne Mineral is a french-language Mineral Magazine devoted to mineralogy, geology and paleontology. In their website software section, they feature the neatest crystallographic shape-drawing shareware program called Faces (version 3.5) by Georges Favreau.
• Mineral Formula Database ftp site by J. D. McDonald contains all mineral names and formula in txt and rtf format from Fleisher and Mandarino (1995).
• Mineral Collectors Page
• Mineralogy Database in HTML format contains a browsable mineral database linked by chemical composition, crystallography, Dana classification, alphabetical listings, physical properties (hardness, density, cleavage, color) and optical properties (index of refraction). This site includes information on all known mineral species.
• Rockhounds Information Page is a good, all-around site with many links.
• The Mineral Gallery is a commercial site with a searchable mineral database.
• The Mineralogical Record finally has a home page. Visit this site to learn about one of the finest mineral specimen magazines.