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  2. Benitoite - Wikipedia

    en.wikipedia.org/wiki/Benitoite

    Benitoite (/ b ə ˈ n iː t oʊ aɪ t /) is a rare blue barium titanium cyclosilicate mineral, found in hydrothermally altered serpentinite. It forms in low temperature, high pressure environments typical of subduction zones at convergent plate boundaries .

  3. 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 ...

  4. 18 Most Expensive Gemstones in the World - AOL

    www.aol.com/finance/18-most-expensive-gemstones...

    Benitoite is a rare gem that looks something like a sapphire. However, it has a much higher refractive index than sapphires or even diamonds, making it sparkle brightly.

  5. List of gemstones by species - Wikipedia

    en.wikipedia.org/wiki/List_of_gemstones_by_species

    This is a list of gemstones, organized by species and types. Minerals ... Benitoite; Beryl subgroup: Aquamarine. Maxixe; ... Rock crystal (var.) Shocked quartz (var ...

  6. San Benito Mountain - Wikipedia

    en.wikipedia.org/wiki/San_Benito_Mountain

    Hobby gem and mineral collectors are drawn to the Clear Creek area, one of the most highly mineralized areas in California, by the presence of over 150 semi-precious minerals and gemstones. Among these are serpentine, jadeite, cinnabar, tremolite, topazite, neptunite, and the extremely rare California state gem, benitoite.

  7. Jonesite - Wikipedia

    en.wikipedia.org/wiki/Jonesite

    In addition to being one of the rarest minerals in the Benitoite Gem mine located in California, Jonesite also is the first titanosilicate mineral with a porous double-layered crystal structure. [10] This discovery is important because titanosilicate frameworks have industrial uses in energy companies and are used in containing radioactive ...