Mindat.org - The largest listing of minerals on the net. Pictures, chemical formulas, locales...everything mineral.
WebMineral - Mineralogy database with all kinds of mineral information, pictures, and links.
Mineral 1.0 - Contains an online rock and mineral quiz, as well as mineral information and pictures for many common minerals.
Fossil 1.0 - Contains an online fossil quiz, as well as fossil information and pictures of many common fossils.
Crocoite.com - Information about the minerals and mineral locations in Australia and New Zealand.
Minerals of Scotland - Articles on Scotland's Minerals, Over 235 mineral photographs, 70 location photographs, and Pages & Photographs on the United Kingdom's minerals.
Organizations, Societies, Clubs, Associations, etc.
The Geological Society of London - Founded 1807, this is the oldest national
geological society in the world and the largest in Europe. Site includes geology news and
debates, photo library, jobs and careers advice, educational material, events and more.
MineralTown.com - Information for mineral
collectors containing articles, educational content, photo galleries, a trade zone, and their very own search engine
and directory of web sites about rocks, gems, fossils and minerals.
Majestic Quartz - Amethyst Quartz Geodes, Quartz crystals
such as Elestial Quartz; Diamantina Quartz Lasers and Cathedral Quartz crystals as well, all for sale at this site.