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  2. Allison and Roberto Mignone Halls of Gems and Minerals

    en.wikipedia.org/wiki/Allison_and_Roberto_Mignon...

    The Allison and Roberto Mignone Halls of Gems and Minerals are a series of exhibition halls at the American Museum of Natural History on the Upper West Side in Manhattan, New York City. The halls opened on June 12, 2021, as a complete redesign of their predecessors, the Harry Frank Guggenheim Hall of Gems and Minerals and Morgan Memorial Hall ...

  3. Taaffeite - Wikipedia

    en.wikipedia.org/wiki/Taaffeite

    Taaffeite (/ ˈ t ɑː f aɪ t /; BeMgAl 4 O 8) is a mineral, named after its discoverer Richard Taaffe (1898–1967) who found the first sample, a cut and polished gem, in October 1945 in a jeweler's shop in Dublin, Ireland. [4] [5] As such, it is the only gemstone to have been initially identified from a faceted stone.

  4. 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. Naturally occurring prasiolite has also been found in the Thunder Bay area of ...

  5. Ametrine - Wikipedia

    en.wikipedia.org/wiki/Ametrine

    It is a mixture of amethyst and citrine with zones of purple and yellow or orange. Almost all commercially available ametrine is mined in Bolivia. The colour of the zones visible within ametrine are due to differing oxidation states of iron within the crystal. The citrine segments have oxidized iron while the amethyst segments are unoxidized.

  6. Hillman Hall of Minerals and Gems - Wikipedia

    en.wikipedia.org/wiki/Hillman_Hall_of_Minerals...

    Pennsylvania Minerals and Gems - specimens representing some of the finest minerals and gems from Pennsylvania. Systematic Collection - exhibiting minerals in systematic groupings by chemical classification according to Dana's System of Mineralogy. Masterpiece Gallery - an esthetic collection of notable mineral specimens from around the world.

  7. 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]

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  9. Rice Northwest Museum of Rocks and Minerals - Wikipedia

    en.wikipedia.org/wiki/Rice_Northwest_Museum_of...

    Bill Dameron of The Mineralogical Record named the museum as having the best mineral specimens in the Pacific Northwest. [17] The collections include gemstones, minerals, fossils, meteorites, and some artifacts. [24] Gemstones include rubies, diamonds, rhodochrosite, opal, emerald, and amethyst among others.