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2. Rock (geology) - Wikipedia

   en.wikipedia.org/wiki/Rock_(geology)

   Most rocks contain silicate minerals, compounds that include silica tetrahedra in their crystal lattice, and account for about one-third of all known mineral species and about 95% of the earth's crust. [6] The proportion of silica in rocks and minerals is a major factor in determining their names and properties. [7]

3. Portal:Minerals - Wikipedia

   en.wikipedia.org/wiki/Portal:Minerals

   The crystal structure of pyrite is primitive cubic, and this is reflected in the cubic symmetry of its natural crystal facets. In crystallography, the cubic (or isometric) crystal system is a crystal system where the unit cell is in the shape of a cube. This is one of the most common and simplest shapes found in crystals and minerals.

4. Timeline of the discovery and classification of minerals

   en.wikipedia.org/wiki/Timeline_of_the_discovery...

   The chemical elements were discovered in identified minerals and with the help of the identified elements the mineral crystal structure could be described. One milestone was the discovery of the geometrical law of crystallization by René Just Haüy , a further development of the work by Nicolas Steno and Jean-Baptiste L. Romé de l'Isle (the ...

5. Mineral - Wikipedia

   en.wikipedia.org/wiki/Mineral

   In rocks, some mineral species and groups are much more abundant than others; these are termed the rock-forming minerals. The major examples of these are quartz, the feldspars, the micas, the amphiboles, the pyroxenes, the olivines, and calcite; except for the last one, all of these minerals are silicates. [39]

6. Mineralogy - Wikipedia

   en.wikipedia.org/wiki/Mineralogy

   Mineralogy applies principles of chemistry, geology, physics and materials science to the study of minerals. Mineralogy [n 1] is a subject of geology specializing in the scientific study of the chemistry, crystal structure, and physical (including optical) properties of minerals and mineralized artifacts.

7. Ever gone rockhounding near the Tri-Cities area? You can find ...

   www.aol.com/news/where-collect-fun-rocks-near...

   Washington state is a hotbed for minerals, gemstones, crystals and fossils, making the Evergreen state a popular site for rockhounding. Whether in an official group or going solo, rockhounding is ...