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  2. Faceting machine - Wikipedia

    en.wikipedia.org/wiki/Faceting_machine

    A quartz gemstone being faceted. First the rough stone is glued to the end of the dop. Once the glue or wax has set, the other end of the dop is inserted into the quill. The index is set to 64, which is the same as 0. The mineral in this example is quartz, so the first angle will be 45 degrees.

  3. St. Peter Sandstone - Wikipedia

    en.wikipedia.org/wiki/St._Peter_Sandstone

    The St. Peter Sandstone is an Ordovician geological formation. It belongs to the Chazyan stage of the Champlainian series in North American regional stratigraphy, equivalent to the late Darriwilian global stage. This sandstone originated as a sheet of sand in clear, shallow water near the shore of a Paleozoic sea and consists of fine-to-medium ...

  4. Quartzite - Wikipedia

    en.wikipedia.org/wiki/Quartzite

    Quartzite. Quartzite is a hard, non- foliated metamorphic rock which was originally pure quartz sandstone. [1][2] Sandstone is converted into quartzite through heating and pressure usually related to tectonic compression within orogenic belts. Pure quartzite is usually white to grey, though quartzites often occur in various shades of pink and ...

  5. Chert - Wikipedia

    en.wikipedia.org/wiki/Chert

    Chert (/ tʃ ɜːr t /) is a hard, fine-grained sedimentary rock composed of microcrystalline or cryptocrystalline quartz, [1] the mineral form of silicon dioxide (SiO 2). [2] Chert is characteristically of biological origin, but may also occur inorganically as a chemical precipitate or a diagenetic replacement, as in petrified wood.

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  7. List of Missouri conservation areas - Wikipedia

    en.wikipedia.org/wiki/List_of_Missouri...

    The Missouri Department of Conservation (MDC) administers hundreds of parcels of land in all counties of the state. Most areas are owned by the department; some are leased by the department; some areas are managed under contract by the department; and some areas are leased to other entities for management. [1][2] The department has divided the ...

  8. craigslist - Wikipedia

    en.wikipedia.org/wiki/Craigslist

    This is an accepted version of this page This is the latest accepted revision, reviewed on 29 September 2024. Classified advertisements website Craigslist Inc. Logo used since 1995 Screenshot of the main page on January 26, 2008 Type of business Private Type of site Classifieds, forums Available in English, French, German, Dutch, Spanish, Italian, Portuguese Founded 1995 ; 29 years ago (1995 ...

  9. Cote Sans Dessein, Missouri - Wikipedia

    en.wikipedia.org/wiki/Cote_Sans_Dessein,_Missouri

    Coordinates: 38°35′16″N 91°59′13″W. Cote Sans Dessein is an extinct town within the still extant Cote Sans Dessein Township in southern Callaway County in the U.S. state of Missouri. The site was on the Missouri River floodplain across the river from Dauphine or Bonnots Mill [1] in Osage County. The town of Cote Sans Dessein survived ...

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