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    Geology Science
    https://geologyscience.com › minerals › quartz

    Quartz | Properties, Varieties, Occurrence and Uses - Geology …

    • Quartz belongs to the trigonal crystal system. The ideal crystal form is a six-sided prism terminating with six-sided pyramids at every cease. In nature quartz crystals are regularly twinned (with dual proper-s… See more

    Geological Settings and Formation Processes

    Quartz is one of the most abundant minerals in the Earth’s crust and can be found in many different geological settings. One of the most common settings for quartz formation i… See more

    Geology Science
    Occurrence of Quartz

    Quartz occurs as an important constituent of those igneous rocks which have an excess of silica, such as granite, rhyolite, pegmatite. It is extremely resistant to both mechanica… See more

    Geology Science
    Mineralogical Characteristics and Diagnostic Tests

    Quartz is a mineral that is composed of silicon and oxygen atoms in a continuous framework of SiO4 silicon–oxygen tetrahedra, with each oxygen being shared between tw… See more

    Geology Science
    Relation to Other Minerals and Mineral Groups

    Quartz is a mineral that belongs to the group of silicate minerals, which also includes feldspars, micas, and zeolites. It is one of the most common minerals on Earth, and it can b… See more

    Geology Science
    Why is quartz a common mineral?
    Quartz is one of the most common minerals because it is chemically and physically stable at Earth’s surface conditions. It is a significant component of hydrothermal veins and felsic igneous rocks, and is often the dominant mineral in sandstones and siltstones, as well as their metamorphosed equivalents.
    commonminerals.esci.umn.edu
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