Chemistry
WebElements, Periodic Table of the Elements
where each chemical element contains a link to a page that explains its chemical properties, health effects, environmental effects, application data.

Crystal chemistry of some Common Mineral Groups
briefly discusses the crystal chemistry of the mineral groups like garnet, plagioclase, pyroxene, mica (muscovite and biotite), amphibole (mainly about hornblende). By Dave Waters, Department of Earth Sciences, University of Oxford.



Crystallography
Crystallography Online
is an integral part of the International Union of Crystallography's (IUCr) information service

The International Union of Crystallography Server
supplies information on the Union, its Commissions and Regional Associates, its journals and other publications.

Mineralogical Crystallography
Special Interest Group of the European Crystallographic Association.

Atlas der Krystallformen von Victor Goldschmidt
(images of plates from the Atlas)

The Giant Crystal project Site
a project devoted to the monitoring and documentation of giant crystals and mineral aggregates



Physical Properties
Testing the Hardness of a Mineral
a short introduction.

Mineral Spectroscopy Server
provides information about color in minerals and access to data on Mineral Absorption Spectra in the visible and infrared regions of the spectrum and Raman spectra of minerals

Minerals under the Microscope
with explanations of colour and pleochroism, interference colours, extinction angle, relief, opacity, etc. (Department of Geology at the University of Bristol)

Optical mineralogy basics
information about mineral light behaviour, colour, relief, cleavage, crystal form, extinction and other properties. (University of British Columbia, Vancouver)

Optical mineralogy
lecture notes, department of earth sciences at Brock University, Ontario, Canada

Optical Mineralogy
Review article on optical mineralogy by Mickey E. Gunter, (Department of Geology and Geological Engineering at the University of Idaho)

Indicatrix Project
on the design of indicatrix models for teaching optical mineralogy

Optical Mineralogy tools
tools that supplement conventional optical mineralogy course materials by Olaf Medenbach at the Institut für Geologie, Mineralogie und Geophysik



Analytical Techniques
Scanning Electron Microscopy
an introduction to electron microscopy and microanalysis and access to an online EDS spectra database. (Geology & Cartography Division, Oxford, Brookes University)

The Electron Probe Technique
information on the microprobe and SEM techniques and a glossary of terms. (University of Oregon, microprobe lab)

Infrared Spectroscopy of Minerals and Gems
a catalogue of FT Raman and Infrared reflection spectrometry of minerals and gemstones

Spindle Stage Short Course
an introduction to the spindle stage, and instructions on how to build one.