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  2. Prasiolite - Wikipedia

    en.wikipedia.org/wiki/Prasiolite

    Prasiolite (also known as green quartz, green amethyst or vermarine) is a green variety of quartz. Since 1950, almost all natural prasiolite has come from a small Brazilian mine, [ citation needed ] but it has also been mined in the Lower Silesia region of Poland .

  3. Quartz - Wikipedia

    en.wikipedia.org/wiki/Quartz

    Prasiolite, an olive colored material, is produced by heat treatment; [68] natural prasiolite has also been observed in Lower Silesia in Poland. [69] Although citrine occurs naturally, the majority is the result of heat-treating amethyst or smoky quartz. [68] Carnelian has been heat-treated to deepen its color since prehistoric times. [70]

  4. Amethyst - Wikipedia

    en.wikipedia.org/wiki/Amethyst

    An amethyst geode that formed when large crystals grew in open spaces inside the rock. The largest amethyst geode found as of 2007 was the Empress of Uruguay, found in Artigas, Uruguay in 2007. It stands at a height of 3.27 meters, lies open along its length, and weighs 2.5 tons. Amethyst is also found and mined in South Korea. [19]

  5. List of gemstones by species - Wikipedia

    en.wikipedia.org/wiki/List_of_gemstones_by_species

    Actinolite. Nephrite (var.); Adamite; Aegirine; Afghanite; Agrellite; Algodonite; Alunite; Amblygonite; Analcime; Anatase; Andalusite. Chiastolite; Andesine ...

  6. Shocked quartz - Wikipedia

    en.wikipedia.org/wiki/Shocked_quartz

    Shocked quartz was discovered following underground nuclear weapons testing, which generated the intense pressures required to alter the quartz lattice. Eugene Shoemaker showed that shocked quartz is also found inside craters created by meteor impact, such as the Barringer Crater and Chicxulub crater. [1]

  7. Talk:Prasiolite - Wikipedia

    en.wikipedia.org/wiki/Talk:Prasiolite

    On Google search, I get 560,000 hits for "prasiolite" and 20,000 hits for "vermarine" (and 10,900 hits for "praseolite"). Prasiolite is the dominant scientific name and vermarine is mostly used in gem/jewellery/new age "crystal healing" contexts. Even the source references used in this article use prasiolite instead of vermarine.

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