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  2. Interference colour chart - Wikipedia

    en.wikipedia.org/wiki/Interference_colour_chart

    When using the chart, it is important to remember these tips: Isotropic and opaque (metallic) minerals cannot be identified this way. The stage of the microscope should be rotated until maximum colour is found, and therefore, the maximum birefringence. Each mineral, depending on the orientation, may not exhibit the maximum birefringence.

  3. File:Suffragette Amethyst, Pearl, & Peridot Dangle Pendant.jpg

    en.wikipedia.org/wiki/File:Suffragette_Amethyst...

    You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.

  4. Peridot - Wikipedia

    en.wikipedia.org/wiki/Peridot

    Peridot (/ ˈ p ɛ r ɪ ˌ d ɒ t,-ˌ d oʊ / PERR-ih-dot, -⁠⁠doh), sometimes called chrysolite, is a yellow-green transparent variety of olivine. Peridot is one of the few gemstones that occur in only one color. Peridot can be found in mafic and ultramafic rocks occurring in lava and peridotite xenoliths of the mantle.

  5. Suffrage jewellery - Wikipedia

    en.wikipedia.org/wiki/Suffrage_jewellery

    An Art Nouveau era Suffragette pendant set with amethyst, pearl, and peridot. A Suffragette brooch set with amethyst, pearl, and peridot. The suffragettes, in particular, successfully embraced the language of contemporary fashion - including its emphasis on delicate femininity - as a strategy for increasing the popular appeal of their movement and dodging the stereotype of the 'masculine ...

  6. Conoscopic interference pattern - Wikipedia

    en.wikipedia.org/wiki/Conoscopic_interference...

    A conoscopic interference pattern or interference figure is a pattern of birefringent colours crossed by dark bands (or isogyres), which can be produced using a geological petrographic microscope for the purposes of mineral identification and investigation of mineral optical and chemical properties.

  7. Pleochroism - Wikipedia

    en.wikipedia.org/wiki/Pleochroism

    Gems are sometimes cut and set either to display pleochroism or to hide it, depending on the colors and their attractiveness. The pleochroic colors are at their maximum when light is polarized parallel with a principal optical vector. The axes are designated X, Y, and Z for direction, and alpha, beta, and gamma in magnitude of the refractive index.

  8. Color chart - Wikipedia

    en.wikipedia.org/wiki/Color_chart

    Color chips or color samples from a plastic pellet manufacturer that enables customers to evaluate the color range as molded objects to see final effects. A color chart or color reference card is a flat, physical object that has many different color samples present. They can be available as a single-page chart, or in the form of swatchbooks or ...

  9. List of colors (alphabetical) - Wikipedia

    en.wikipedia.org/wiki/List_of_colors_(alphabetical)

    This is an accepted version of this page This is the latest accepted revision, reviewed on 14 December 2024. For other color lists, see Lists of colors. This article relies largely or entirely on a single source. Relevant discussion may be found on the talk page. Please help improve this article by introducing citations to additional sources. Find sources: "List of colors" alphabetical ...

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