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  2. Rare-earth element - Wikipedia

    en.wikipedia.org/wiki/Rare-earth_element

    The rare-earth elements (REE), also called the rare-earth metals or rare earths, and sometimes the lanthanides or lanthanoids (although scandium and yttrium, which do not belong to this series, are usually included as rare earths), [1] are a set of 17 nearly indistinguishable lustrous silvery-white soft heavy metals. Compounds containing rare ...

  3. Niobium - Wikipedia

    en.wikipedia.org/wiki/Niobium

    Niobium oxidizes in Earth's atmosphere very slowly, hence its application in jewelry as a hypoallergenic alternative to nickel. Niobium is often found in the minerals pyrochlore and columbite. Its name comes from Greek mythology: Niobe, daughter of Tantalus, the namesake of tantalum. The name reflects the great similarity between the two ...

  4. Euxenite - Wikipedia

    en.wikipedia.org/wiki/Euxenite

    Euxenite is used as an ore of the rare earth elements it contains. Rare large crystals have also been used in jewelry. [5] References a b; a b c; a b; a b; This page ...

  5. BMW, Yamaha Motor back US rare earths startup Phoenix Tailings

    www.aol.com/news/bmw-yamaha-motor-back-us...

    Rare earths are a group of 17 metals used to make magnets that turn power into motion for electric vehicles, cell phones and other electronics. ... 8 jewelry trends that are in for 2025 and 3 that ...

  6. 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 ...

  7. Rhodium - Wikipedia

    en.wikipedia.org/wiki/Rhodium

    Solid (pure) rhodium jewelry is very rare, more because of the difficulty of fabrication (high melting point and poor malleability) than because of the high price. [48] The high cost ensures that rhodium is applied only as an electroplate. Rhodium has also been used for honors or to signify elite status, when more commonly used metals such as ...