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  2. List of minerals - Wikipedia

    en.wikipedia.org/wiki/List_of_minerals

    This is a list of minerals which have Wikipedia articles.. Minerals are distinguished by various chemical and physical properties. Differences in chemical composition and crystal structure distinguish the various species.

  3. 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]

  4. 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]

  5. List of minerals recognized by the International ...

    en.wikipedia.org/wiki/List_of_minerals...

    It can be found as a mineral (chemical formula: (Fe,Os,Ru,Ir)). It is not only schapbachite that had a longer controversy. Other minerals have a complicated history, as well. Imogolite, 9.ED.20, was first published 1962. [35] [36] Its formal discreditation by the IMA was published 1967, as its description was incomplete. [37]

  6. List of rock types - Wikipedia

    en.wikipedia.org/wiki/List_of_rock_types

    List of rocks on Mars – Alphabetical list of named rocks and meteorites found on Mars; Rock cycle – Transitional concept of geologic time; List of rock formations: for a list of unusual or culturally significant rock outcrops; Leaverite – Rock in the field that looks interesting but is actually not

  7. Portal:Minerals - Wikipedia

    en.wikipedia.org/wiki/Portal:Minerals

    A rock may consist of one type of mineral or may be an aggregate of two or more different types of minerals, spacially segregated into distinct phases. Some natural solid substances without a definite crystalline structure, such as opal or obsidian , are more properly called mineraloids .

  8. List of gemstones by species - Wikipedia

    en.wikipedia.org/wiki/List_of_gemstones_by_species

    4 Rocks. 5 Chatoyant gems. 6 Asterism. 7 See also. 8 References. ... Some minerals made into gemstones may display a chatoyancy or cat's eye effect, these include: [1 ...

  9. Granite - Wikipedia

    en.wikipedia.org/wiki/Granite

    These rocks are classified by the relative percentages of quartz, alkali feldspar, and plagioclase (the QAPF classification), with true granite representing granitic rocks rich in quartz and alkali feldspar. Most granitic rocks also contain mica or amphibole minerals, though a few (known as leucogranites) contain almost no dark minerals.

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