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  2. Empress of Uruguay - Wikipedia

    en.wikipedia.org/wiki/Empress_of_Uruguay

    The Empress of Uruguay is the world's largest amethyst geode, standing at a height of 3.27 meters. It is open along its length and weighs 2.5 tons in its current state. It was discovered in 2007 in the Artigas department, Uruguay by the Uruguayan mining company Le Stage Minerals.

  3. Heliotrope (mineral) - Wikipedia

    en.wikipedia.org/wiki/Heliotrope_(mineral)

    A rough specimen of bloodstone. Heliotropes (from Ancient Greek ἥλιος (hḗlios) 'sun' and τρέπειν (trépein) 'to turn') (also called ematille, Indian bloodstones, or simply bloodstones) are aggregate minerals, and cryptocrystalline mixture of quartz that occurs mostly as jasper or sometimes as chalcedony (translucent).

  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. Geode - Wikipedia

    en.wikipedia.org/wiki/Geode

    A geode (/ ˈ dʒ iː. oʊ d /; from Ancient Greek γεώδης (geṓdēs) 'earthlike') is a geological secondary formation within sedimentary and volcanic rocks. Geodes are hollow, vaguely spherical rocks, in which masses of mineral matter (which may include crystals) are secluded.

  6. Vein (geology) - Wikipedia

    en.wikipedia.org/wiki/Vein_(geology)

    Vugs, cavities and geodes are all examples of open-space filling phenomena in hydrothermal systems. Alternatively, hydraulic fracturing may create a breccia which is filled with vein material. Such breccia vein systems may be quite extensive, and can form the shape of tabular dipping sheets, diatremes or laterally extensive mantos controlled by ...

  7. List of Jewelpets and Sweetspets - Wikipedia

    en.wikipedia.org/wiki/List_of_Jewelpets_and...

    She appears on Jewelpet Sunshine as a captain of a Pirate Group. She actually a 9th generation Pirate who inherited the name "Captain Amethyst", to protect the legendary "Rainbow Jewel". In Kira Deco, she is Goriking's servant and a supportive character for the KiraDeco team. In Happiness, she attends a Christmas Party in the Jewelpet Cafe ...

  8. Druse (geology) - Wikipedia

    en.wikipedia.org/wiki/Druse_(geology)

    In geology and mineralogy, druse is a crystal habit represented by the coating of fine crystals on a rock fracture surface, [1] or vein or within a vug or geode. [ 2 ] See also

  9. Petrified wood - Wikipedia

    en.wikipedia.org/wiki/Petrified_wood

    Amethyst Ridge at Yellowstone National Park shows 27 successive forest ecosystems buried by eruptions, while Petrified Forest National Park is a particularly fine example of fluvial accumulations of driftwood. [2] Volcanic ash is particularly suitable for preservation of wood, because large quantities of silica are released as the ash weathers.