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  2. Ammolite - Wikipedia

    en.wikipedia.org/wiki/Ammolite

    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-based mining company Korite. Marcel Charbonneau and his business partner Mike Berisoff were the first to create commercial doublets of the gem in 1967. They went on to form ...

  3. Korite - Wikipedia

    en.wikipedia.org/wiki/Korite

    Korite is the largest commercial producer of ammolite. The company produces natural ammolite gemstones and jewelry. Korite is based in Calgary, Alberta, Canada. The firm's sister company, Canada Fossils Ltd., provides it with ammonites and other fossils. It is a member of the American Gem Trade Association.

  4. List of gemstones by species - Wikipedia

    en.wikipedia.org/wiki/List_of_gemstones_by_species

    Actinolite. Nephrite (var.); Adamite; Aegirine; Afghanite; Agrellite; Algodonite; Alunite; Amblygonite; Analcime; Anatase; Andalusite. Chiastolite; Andesine ...

  5. Gemstone - Wikipedia

    en.wikipedia.org/wiki/Gemstone

    [4] [5] Most gemstones are hard, but some softer minerals such as brazilianite may be used in jewelry [6] because of their color or luster or other physical properties that have aesthetic value. However, generally speaking, soft minerals are not typically used as gemstones by virtue of their brittleness and lack of durability.

  6. Aragonite - Wikipedia

    en.wikipedia.org/wiki/Aragonite

    Aragonite is a carbonate mineral and one of the three most common naturally occurring crystal forms of calcium carbonate (Ca CO 3), the others being calcite and vaterite.It is formed by biological and physical processes, including precipitation from marine and freshwater environments.

  7. Korita - Wikipedia

    en.wikipedia.org/wiki/Korita

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