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  2. Rutilated quartz - Wikipedia

    en.wikipedia.org/wiki/Rutilated_quartz

    Rutilated quartz is a variety of quartz which contains acicular (needle-like) inclusions of rutile. [1] It is used for gemstones. These inclusions mostly look golden ...

  3. List of mineral tests - Wikipedia

    en.wikipedia.org/wiki/List_of_mineral_tests

    The Mohs Hardness Scale is the main scale to measure mineral hardness. Finger nail is 2.5, copper coin is 3.5, glass is 5.5 and steel is 6.5. Hardness scale is Talc is 1, Gypsum is 2, Calcite is 3, Fluorite is 4, Apatite is 5, Orthoclase Feldspar is 6, Quartz is 7, Topaz is 8, Corundum is 9 and Diamond is 10. Odor; Not always recommended.

  4. Rutile - Wikipedia

    en.wikipedia.org/wiki/Rutile

    Rutile in quartz Within the igneous environment, rutile is a common accessory mineral in plutonic igneous rocks , though it is also found occasionally in extrusive igneous rocks , particularly those such as kimberlites and lamproites that have deep mantle sources.

  5. Mohs scale - Wikipedia

    en.wikipedia.org/wiki/Mohs_scale

    For example, some sources have assigned a Mohs hardness of 6 or 7 to granite but it is a rock made of several minerals, each with its own Mohs hardness (e.g. topaz-rich granite contains: topaz — Mohs 8, quartz — Mohs 7, orthoclase — Mohs 6, plagioclase — Mohs 6–6.5, mica — Mohs 2–4).

  6. Rosiwal scale - Wikipedia

    en.wikipedia.org/wiki/Rosiwal_scale

    The Rosiwal scale attempts to give more quantitative values of scratch hardness, unlike the Mohs scale which is a qualitative measurement with relative values. The Rosiwal method (also called the Delesse-Rosiwal method [ 1 ] ) is a method of petrographic analysis and is performed by scratching a polished surface under a known load using a ...

  7. Missing Girl, 17, Who Reportedly Left Home After Family ... - AOL

    www.aol.com/missing-girl-17-reportedly-left...

    Jennaleah “Jenna” Hin, 17, of Henderson, Nevada, was reported missing since Dec. 30 after she reportedly left home following a family dispute At a press conference held on Jan. 3, her parents ...

  8. Justin Jefferson ends longest TD drought of his career with ...

    www.aol.com/sports/justin-jefferson-ends-longest...

    Justin Jefferson ended the longest touchdown drought of his career on Sunday, a score that was made possible thanks to bizarre special-teams penalty on the Falcons.. Jefferson scored the touchdown ...

  9. Creedite - Wikipedia

    en.wikipedia.org/wiki/Creedite

    It has a Mohs hardness of 3.5 to 4 and a specific gravity of 2.7. Creedite was first described in 1916 from the Creede Quadrangle in Mineral County, Colorado . It is a product of intense oxidation of ore deposits.

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