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  2. Luminous gemstones - Wikipedia

    en.wikipedia.org/wiki/Luminous_gemstones

    Legends about snakes that carry a marvelous jewel either in their forehead or in their mouth are found almost worldwide. Scholars have suggested that the myth may have originated with snake worship, or light reflected by a serpent's eye, or the flame color of certain snakes' lips. In only a relative few of these legends is the stone luminous ...

  3. Lapis lazuli - Wikipedia

    en.wikipedia.org/wiki/Lapis_Lazuli

    A mixture of other minerals, often including pyrite. Lapis lazuli ( UK: / ˌlæpɪs ˈlæz ( j) ʊli, ˈlæʒʊ -, - ˌli /; US: / ˈlæz ( j) əli, ˈlæʒə -, - ˌli / ), or lapis for short, is a deep-blue metamorphic rock used as a semi-precious stone that has been prized since antiquity for its intense color.

  4. Charoite - Wikipedia

    en.wikipedia.org/wiki/Charoite

    Charoite is translucent lavender to purple in color with a pearly luster. Charoite is strictly massive in nature, and fractures are conchoidal. It has an unusual swirling, fibrous appearance, sometimes chatoyant, and that, along with its intense color, can lead many to believe at first that it is synthetic or enhanced artificially.

  5. Amethyst - Wikipedia

    en.wikipedia.org/wiki/Amethyst

    Amethyst. Amethyst is a violet variety of quartz. The name comes from the Koine Greek αμέθυστος amethystos from α- a-, "not" and μεθύσκω ( Ancient Greek) methysko / μεθώ metho ( Modern Greek ), "intoxicate", a reference to the belief that the stone protected its owner from drunkenness. [ 1]

  6. Gemstone irradiation - Wikipedia

    en.wikipedia.org/wiki/Gemstone_irradiation

    Gemstone irradiation is a process in which a gemstone is artificially irradiated in order to enhance its optical properties. High levels of ionizing radiation can change the atomic structure of the gemstone's crystal lattice, which in turn alters the optical properties within it. [ 1] As a result, the gem­stone's color may be significantly ...

  7. Shades of purple - Wikipedia

    en.wikipedia.org/wiki/Shades_of_purple

    In formal color theory, purple colors often refer to the colors on the line of purples on the CIE chromaticity diagram (or colors that can be derived from colors on the line of purples), i.e., any color between red and violet, not including either red or violet themselves. [7] [8] The first recorded use of purple as a color name in English was ...

  8. Cardinal gem - Wikipedia

    en.wikipedia.org/wiki/Cardinal_gem

    Clockwise from top: sapphire, ruby, emerald, amethyst, diamond. Cardinal gems are gemstones which have traditionally been considered precious above all others. The classification of the cardinal gems dates back to antiquity, and was largely determined by ceremonial or religious use as well as rarity. [ 1] The term has largely fallen out of use.

  9. Rural communities of color across the US find new ways to get ...

    www.aol.com/lifestyle/rural-communities-color...

    But hospitals have closed throughout rural America in the last decade, leaving some of the 46 million people who live in these areas fewer options to get the care they need when they need it.

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