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  2. 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]

  3. Empress of Uruguay - Wikipedia

    en.wikipedia.org/wiki/Empress_of_Uruguay

    The geode was found in a mine near the city of Artigas, known for its spectacular geodes and amethysts. It was extracted from the surrounding basalt in a complicated process that took three months. The top part was cut to allow for a view of the interior and the amethyst crystals that were on the top were sold.

  4. Geode - Wikipedia

    en.wikipedia.org/wiki/Geode

    Large, amethyst-lined geodes are a feature of the basalts of the Paraná and Etendeka traps found in Brazil, Uruguay and Namibia. Geodes are common in some formations in the United States (mainly in Indiana, Iowa, Missouri, western Illinois, Kentucky, and Utah). Geodes are also abundant in the Mendip Hills in Somerset, England, where they are ...

  5. Artigas Department - Wikipedia

    en.wikipedia.org/wiki/Artigas_Department

    Semi-precious gemstones, such as agates and amethysts, are also found in the department, and an entire industry has risen up around their extraction and manufacturing, especially near the capital city of Artigas. The largest amethyst geode worldwide was discovered in Artigas in 2007, called the Empress of Uruguay. It stands at a height of 3.27 ...

  6. Artigas, Uruguay - Wikipedia

    en.wikipedia.org/wiki/Artigas,_Uruguay

    In respect of it being 'the site of world-class amethyst deposits, where the largest amethyst-filled giant geodes were ever found', the International Union of Geological Sciences (IUGS) included the 'Deposits of Amethyst of Los Catalanes Gemological District' in its assemblage of 100 'geological heritage sites' around the world in a listing ...

  7. List of U.S. state minerals, rocks, stones and gemstones

    en.wikipedia.org/wiki/List_of_U.S._state...

    In 1986, California named benitoite as its state gemstone, a form of the mineral barium titanium silicate that is unique to the Golden State and only found in gem quality in San Benito County. [ 80 ] ^ Colorado is the only state whose geological symbols reflect the national flag's colors: red (rhodochrosite), white (yule marble), and blue ...

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  9. Quartz - Wikipedia

    en.wikipedia.org/wiki/Quartz

    Amethyst is a form of quartz that ranges from a bright vivid violet to a dark or dull lavender shade. The world's largest deposits of amethysts can be found in Brazil, Mexico, Uruguay, Russia, France, Namibia, and Morocco. Sometimes amethyst and citrine are found growing in the same crystal. It is then referred to as ametrine. Amethyst derives ...

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