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  2. Gold plating - Wikipedia

    en.wikipedia.org/wiki/Gold_plating

    Gold plated - gold layer thickness greater than or equal to 0.5 micron; Heavy gold plated / Vermeil - gold layer thickness greater than or equal to 2.5 micron; Gold plated silver jewellery can still tarnish as the silver atoms diffuse into the gold layer, causing slow gradual fading of its color and eventually causing tarnishing of the surface ...

  3. How to Spot The Best Vintage Jewelry in Thrift Stores ... - AOL

    www.aol.com/spot-best-vintage-jewelry-thrift...

    For example, 10k, 14k, and 18k mean 10-carat, 14-carat, and 18-carat gold, and 925 indicates sterling silver. You may also see a maker’s mark, which provides information on who made the piece ...

  4. Gilding - Wikipedia

    en.wikipedia.org/wiki/Gilding

    Gilding gives an object a gold appearance at a fraction of the cost of creating a solid gold object. In addition, a solid gold piece would often be too soft or too heavy for practical use. A gilt surface also does not tarnish as silver does. Modern gilding is applied to numerous and diverse surfaces and by various processes.

  5. Jewellery cleaning - Wikipedia

    en.wikipedia.org/wiki/Jewellery_cleaning

    Jewelry with gemstones such as diamonds or sapphires can be cleaned at home as well using mild soap and warm water. However, gemstones such as opals and pearls should be done professionally. Another issue is the age of jewelry, as certain materials or build strategies of older jewelry (such as from the Georgian era ) may have restrictions, such ...

  6. Glamorous gold jewelry staples you can wear on repeat — all ...

    www.aol.com/lifestyle/glamorous-gold-jewelry...

    This pack of 12 rings plated in 18k gold has something for everyone, from signets to chunky twists. This assortment includes a range of sizes (4 to 9), so you can wear them all at once as a set ...

  7. A Touch of Tarnish at IAMGOLD

    www.aol.com/news/2012-11-16-a-touch-of-tarnish...

    Gold bullion may not be prone to tarnish, but that doesn't stop the producers of the metal from exhibiting a dulled finish from time to time. Mid-tier miner IAMGOLD (NYS: IAG) had been shining ...

  8. Tarnish - Wikipedia

    en.wikipedia.org/wiki/Tarnish

    Tarnish does not always result from the sole effects of oxygen in the air. For example, silver needs hydrogen sulfide to tarnish, although it may tarnish with oxygen over time. It often appears as a dull, gray or black film or coating over metal. Tarnish is a surface phenomenon that is self-limiting, unlike rust. Only the top few layers of the ...

  9. Fineness - Wikipedia

    en.wikipedia.org/wiki/Fineness

    For example, a gold alloy of 127 ⁄ 128 fineness (that is, 99.2% purity) could have been described as being 23-karat, 3-grain, 1-quart gold. The carat fractional system is increasingly being complemented or superseded by the millesimal system, described above for bullion, though jewelry generally tends to still use the carat system.

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