HEATKEYS

Complete, up-to-date, mineral database containing 4,714 mineral species descriptions and comprehensive picture library of images. These data are linked to mineral tables by crystallography, chemical composition, physical and optical properties, Dana ...

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Amethyst Galleries

Explore the updated online encyclopedia from Encyclopaedia Britannica with hundreds of thousands of articles, biographies, videos, images, and web sites.

Dictionary.com - the largest and most trusted free online dictionary. Instantly look up accurate and extensive definitions and word meanings, and hear audio pronunciations.

UW-Green Bay has exceptional facilities, affordable bachelor’s and master’s degree programs, and a scenic lakeshore campus. Part of the tradition-rich University of Wisconsin System.

An innovative University with multi-disciplinary research taught by internationally renowned faculty. Over 125 degree programs to meet your interests.

MolTech home page provides information on the company product range divided in the following groups: nonlinear organic and inorganic single crystals, materials for solid-state lasers, optical materials, scintillators and laser devices. Features, basi...

Science, astronomy, and space flight news, science and renewable energy encyclopedias. Maintained by science writer David Darling, Ph.D.

The Gemology Project: The Largest Gemological Database on the Internet