The Virtual Museum of Minerals and Molecules

The Virtual Museum of Minerals and Molecule is a web-based focal point and resource for 3-D visualizations of molecules and minerals. The visualizations utilize the Jmol applet in a web browser, which allows them to be interactively zoomed and rotated so they can be viewed from all angles, much as with a real molecule. They can also be programmed with highlighting features that allow identification of specific atoms, structural sub-components, and mineralogical planes.
The 3-D visualizations are incorporated into stand-alone HTML (WWW) instructional modules that combine text, graphics, molecular formulae, highlighting features, electron micrographs, and other appropriate instructional aids and materials.

http://virtual-museum.soils.wisc.edu/_museum.html