Over 3,900 mineral species descriptions are included in this HTML-linked table of Dana classifications for all known valid mineral species. 3-D models are available for over 600 minerals.

The official Nobel biography of William Lawrence Bragg. the son of William Henry Bragg, who shared the 1915 Nobel Prize in Physics with his father. This article focuses on Bragg's science activities, positions, and achievements and honors.

Learn about the crystal patterns and shapes of select minerals (diamond, quartz, muscovite, and topaz) and how to grow your own rock candy crystals.

This resrouce presents instructions for using nine easy to obtain materials for making crystals. The lab takes about 24 hours and it contains a brief explanation of how crystals form.

Ever break open a geode and see the beauty inside? Learn how those crystals formed, as well as the mineral formations in thunder eggs and concretions.

Kid's learn about the science of crystals. Repeating patterns of molecules form interesting shapes.

[Free Registration/Login Required] An interactive animation demonstrating how the mineral crystal in an igneous rock formed due to the cooling magma. Site also includes a short quiz on the formation of the crystal.

A collection of geology exercises which include relevant background information, complete instructions, student handouts, and answer keys. Topics include rock and mineral identification, Bowen's reaction series, crystal models,...

What are rocks made of? Where do rocks come from? What is an igneous rock? These are just some of the questions answered by the scientists of the U.S. Geologic Survey.

This site is filled with information on the mineral quartz. General information, images, physical properties, and resources are also included.

This colorful site contains pictures of amethyst crystals that are displayed in the Smithsonian Museum of Natural History.

This encyclopedia article from Wikipedia provides a general overview of the gemstone topaz. Liinks are provided for additional information on related subjects.

From the Trinity Mineral Company web site. Crystal systems and crystal classes are explained. A table lists the seven crystal systems and the various classes within each system. Colored diagrams depict the geometric structure of each...

This photo shows aragonite, a carbonate mineral and one of two crystal forms of calcium carbonate.

This textbook excerpt illustrates the reactions observed to occur between minerals and magma, and the order of these reactions during magma crystallization that was described by Norman Bowen in the 1920s.

In nature there are many different minerals we call "Salts". If you look very closely at the particles of table salt, you will find little cubic crystals. These salt crystals are made of sodium chloride (NaCl), and their cubic shape is...

This colorful site contains pictures of amethyst crystals that are displayed in the Smithsonian Museum of Natural History.