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  2. Inclusion (mineral) - Wikipedia

    en.wikipedia.org/wiki/Inclusion_(mineral)

    In mineralogy, an inclusion is any material trapped inside a mineral during its formation. In gemology , it is an object enclosed within a gemstone or reaching its surface from the interior. [ 1 ] According to James Hutton 's law of inclusions, fragments included in a host rock are older than the host rock itself.

  3. Fluid inclusion - Wikipedia

    en.wikipedia.org/wiki/Fluid_inclusion

    Hydrothermal ore minerals, which typically form from high temperature aqueous solutions, trap tiny bubbles of liquids or gases when cooling and forming solid rock. The trapped fluid in an inclusion preserves a record of the composition, temperature and pressure of the mineralizing environment. [1] An inclusion often contains two or more phases ...

  4. Diamond inclusions - Wikipedia

    en.wikipedia.org/wiki/Diamond_inclusions

    The timing of mineral crystallization can be used to categorize diamond inclusions into three types: protogenetic, syngenetic, and epigenetic inclusions. [14] Minerals in the protogenetic inclusions were crystallized earlier than the diamond formation. The host diamond encapsulated pre-existing minerals during its crystallization.

  5. Diamond flaw - Wikipedia

    en.wikipedia.org/wiki/Diamond_flaw

    An inclusion is visible in near the center of an uncut diamond. Some diamonds show the presence of small crystals, minerals or other diamonds. These are classified in different categories depending on the size and structure of the inclusion.

  6. Peridot - Wikipedia

    en.wikipedia.org/wiki/Peridot

    The most common mineral inclusion in peridot is the chromium-rich mineral chromite. Magnesium-rich minerals also can exist in the form of pyrope and magnesiochromite. These two types of mineral inclusions are typically surrounded "lily-pad" cleavages. Biotite flakes appear flat, brown, translucent, and tabular. [16]

  7. Mafic - Wikipedia

    en.wikipedia.org/wiki/Mafic

    A mafic mineral or rock is a silicate mineral or igneous rock rich in magnesium and iron. Most mafic minerals are dark in color, and common rock-forming mafic minerals include olivine, pyroxene, amphibole, and biotite. Common mafic rocks include basalt, diabase and gabbro. Mafic rocks often also contain calcium-rich varieties of plagioclase ...

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