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  2. Jet (gemstone) - Wikipedia

    en.wikipedia.org/wiki/Jet_(gemstone)

    Jet (gemstone) Jet is a type of lignite, [ 1] the lowest rank of coal, and is a gemstone. Unlike many gemstones, jet is not a mineral, but is rather a mineraloid. [ 2] It is derived from wood that has changed under extreme pressure. The English noun jet derives from the French word for the same material, jaiet (modern French jais ), ultimately ...

  3. Ammolite - Wikipedia

    en.wikipedia.org/wiki/Ammolite

    It was designated the official gemstone of Lethbridge, Alberta, Canada in 2007, [ 2][ 3] and was subsequently designated as Alberta's official gemstone in April 2022. [ 4] Ammolite is also known as aapoak ( Kainah for "small, crawling stone"), gem ammonite, calcentine, and korite. The latter is a trade name given to the gemstone by the Alberta ...

  4. Gemstone - Wikipedia

    en.wikipedia.org/wiki/Gemstone

    Gemstone. Group of precious and semiprecious stones—both uncut and faceted—including ( clockwise from top left) diamond, uncut synthetic sapphire, ruby, uncut emerald, and amethyst crystal cluster. A gemstone (also called a fine gem, jewel, precious stone, semiprecious stone, or simply gem) is a piece of mineral crystal which, when cut or ...

  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. Sugilite - Wikipedia

    en.wikipedia.org/wiki/Sugilite

    Sugilite ( / ˈsuːɡəlaɪt, - dʒi -/ SOO-gə-lyte, -⁠jee-) [ 2][ 3] is a relatively rare pink to purple cyclosilicate mineral with the complex chemical formula K Na 2 ( Fe, Mn, Al) 2 Li 3 Si 12 O 30. Sugilite crystallizes in the hexagonal system with prismatic crystals. The crystals are rarely found and the form is usually massive.

  7. Shell jewelry - Wikipedia

    en.wikipedia.org/wiki/Shell_jewelry

    Shell jewelry is a type of shellcraft. One very common form of shell jewelry is necklaces that are composed of large numbers of beads, where each individual bead is the whole (but often drilled) shell of a small sea snail. Numerous other varieties of shell jewelry are made, including bracelets and earrings . As well as sea snail shells, shell ...

  8. Necklace - Wikipedia

    en.wikipedia.org/wiki/Necklace

    Necklace. A necklace is an article of jewellery that is worn around the neck. Necklaces may have been one of the earliest types of adornment worn by humans. [ 1] They often serve ceremonial, religious, magical, or funerary purposes and are also used as symbols of wealth and status, given that they are commonly made of precious metals and stones.

  9. Diamond (gemstone) - Wikipedia

    en.wikipedia.org/wiki/Diamond_(gemstone)

    Diamond[ a] is a gemstone formed by cutting a raw diamond. Diamonds are one of the best-known and most sought-after gems, and they have been used as decorative items since ancient times. The hardness of diamond and its high dispersion of light —giving the diamond its characteristic "fire"—make it useful for industrial applications and ...

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