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https://www.gemporia.com/en-us/gemology-hub/article/1139/what-is-topaz--gemstone-facts-and-information/
Nov 13, 2020 · Topaz is a tough gemstone, measuring 8 on the Mohs scale of gemstone hardness. This means very few other gemstones will scratch Topaz, but some of the ones that will include Diamond, Ruby, Sapphire and Emerald. This means that Topaz will scratch almost all other gemstones.4.8/5
https://www.gemsociety.org/article/topaz-jewelry-and-gemstone-information/
Jan 20, 2020 · The traditional November birthstone, topaz is a popular gem. Although frequently associated with golden yellow as well as blue, it can be found in a variety of colors, including colorless. The rarest are natural pink, red, and fine golden orange, sometimes with a pink tone. Topaz ValueLuster: Vitreous
https://www.nrc.gov/reading-rm/doc-collections/fact-sheets/irradiated-gemstones.html
Jan 06, 2021 · Backgrounder on Irradiated Gemstones. Printable Version. Some gemstones are exposed to radiation to enhance or change their color. Topaz is the most commonly treated stone. Typically orange, topaz becomes blue after it has been exposed. Diamonds and other precious gems may also be treated with radiation. This process of irradiation can make the ...
https://www.gia.edu/topaz-care-cleaning
Jul 27, 2021 · Besides irradiation and heat treatment, there is another treatment that involves coating colorless topaz with a microscopic layer of metallic oxide compound. The coating is not very durable. It can resist daily wear and tear, but abrasive cleaners or buffing wheels would remove it. It’s safe to use a mild soap solution.
https://www.gemselect.com/other-info/about-blue-topaz.php
Oct 17, 2007 · About Blue Topaz. According to a well-known gem and jewelry industry magazine, "Colored Stone", since the early 2000s, blue topaz has become the second most popular gemstone in the world (sapphire is consistently number one). Topaz popularity is certainly not surprising. Topaz is a very hard material - 8 on the Mohs hardness scale - and blue topaz is a very pretty stone that is …
https://www.gemselect.com/gem-info/topaz/topaz-info.php
Oct 21, 2019 · The most common natural color for topaz is pale yellow or brown, in fact, traditionally nearly all yellowish gemstones were known as topaz, but occasionally pink, orange, red, purple or blue crystals would be found.
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