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  2. Gemstone - Wikipedia

    en.wikipedia.org/wiki/Gemstone

    Most citrine is made by heating amethyst, and partial heating with a strong gradient results in "ametrine" – a stone partly amethyst and partly citrine. Aquamarine is often heated to remove yellow tones, or to change green colors into the more desirable blue, or enhance its existing blue color to a deeper blue. [42]

  3. $1800.00 at Jean Dousset. Lucette Cathedral Engagement Ring. Shane & Co. has several locations across the country, but the brand also makes it incredibly easy to find a beautifully crafted ...

  4. Gemstone irradiation - Wikipedia

    en.wikipedia.org/wiki/Gemstone_irradiation

    Gemstone irradiation is a process in which a gemstone is exposed to artificial radiation 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]

  5. Jewellery - Wikipedia

    en.wikipedia.org/wiki/Jewellery

    Jewellery (or jewelry in American English) consists of decorative items worn for personal adornment such as brooches, rings, necklaces, earrings, pendants, bracelets, and cufflinks. Jewellery may be attached to the body or the clothes. From a western perspective, the term is restricted to durable ornaments, excluding flowers for example.

  6. Engraved gem - Wikipedia

    en.wikipedia.org/wiki/Engraved_gem

    Though white-on-blue matte jasperware is the most familiar Wedgwood ceramic line, still in production today and widely imitated since the mid-19th century, white-on-black was also produced. Wedgwood made notable jasperware copies of the Portland Vase and the Marlborough gem , a famous head of Antinous , [ 61 ] and interpreted in jasperware ...

  7. Moonstone (gemstone) - Wikipedia

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

    The name moonstone derives from the stone's characteristic visual effect, called adularescence (or schiller), which produces a milky, bluish interior light. This effect is caused by light diffraction through alternating layers of orthoclase and albite within the stone.

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