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  2. Parquet Courts - Wikipedia

    en.wikipedia.org/wiki/Parquet_Courts

    The band's second studio album, Light Up Gold (2012), was initially released on Savage's Dull Tools label and later reissued on What's Your Rupture? in 2013. [1] Light Up Gold received widespread critical acclaim in both the DIY underground and mainstream rock press.

  3. Quartz - Wikipedia

    en.wikipedia.org/wiki/Quartz

    Quartz is, therefore, classified structurally as a framework silicate mineral and compositionally as an oxide mineral. Quartz is the second most abundant mineral in Earth's continental crust, behind feldspar. [10] Quartz exists in two forms, the normal α-quartz and the high-temperature β-quartz, both of which are chiral. The transformation ...

  4. Light Up Gold - Wikipedia

    en.wikipedia.org/wiki/Light_Up_Gold

    Light Up Gold is the second studio album by American indie rock band Parquet Courts, initially released on August 18, 2012 on the lead frontman Andrew Savage's label Dull Tools. It was later released on a larger label, What's Your Rupture?, on January 15, 2013.

  5. Luminous gemstones - Wikipedia

    en.wikipedia.org/wiki/Luminous_gemstones

    Josiah Wedgwood, in 1792, found phosphoresce from rubbing together two pieces of quartz or of agate, and wrote that the ruby gives "a beautiful red light of short continuance." Edmond Becquerel reported in 1861 that ruby fluoresces better than sapphire , red feldspar fluoresces, and crushed orthoclase will flame.

  6. Triboluminescence - Wikipedia

    en.wikipedia.org/wiki/Triboluminescence

    Triboluminescence of nicotine L-salicylate. Triboluminescence is a phenomenon in which light is generated when a material is mechanically pulled apart, ripped, scratched, crushed, or rubbed (see tribology).

  7. Extinction (optical mineralogy) - Wikipedia

    en.wikipedia.org/wiki/Extinction_(optical...

    Extinction is a term used in optical mineralogy and petrology, which describes when cross-polarized light dims, as viewed through a thin section of a mineral in a petrographic microscope. Isotropic minerals, opaque (metallic) minerals, and amorphous materials (glass) do not allow light transmission under cross-polarized light (i.e. constant ...

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  9. Undulose extinction - Wikipedia

    en.wikipedia.org/wiki/Undulose_extinction

    Undulose extinction or undulatory extinction is a geological term referring to the type of extinction that occurs in certain minerals when examined in thin section under cross polarized light. As the microscope stage is rotated, individual mineral grains appear black when the polarization due to the mineral prevents any light from passing through.

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