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  2. Gemstone irradiation - Wikipedia

    en.wikipedia.org/wiki/Gemstone_irradiation

    The most commonly irradiated gemstone is topaz, which usually becomes blue after the process. [3] Intensely blue topaz does not exist in nature and is the result of artificial irradiation. [ 27 ] According to the American Gem Trade Association, approximately 30 million carats (6,000 kg or 13,000 lb) of topaz are irradiated every year globally ...

  3. Gemstone - Wikipedia

    en.wikipedia.org/wiki/Gemstone

    Virtually all blue topaz, both the lighter and the darker blue shades such as "London" blue, has been irradiated to change the color from white to blue. Most green quartz (Oro Verde) are also irradiated to achieve the yellow-green color. Diamonds are mainly irradiated to become blue-green or green, although other colors are possible.

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  5. Birthstone - Wikipedia

    en.wikipedia.org/wiki/Birthstone

    In 1912, to standardize birthstones, the (American) National Association of Jewelers (now called Jewelers of America) met in Kansas and officially adopted a list. [1]: 317 The Jewelry Industry Council of America updated the list in 1952 [3]: 311 by adding Alexandrite for June, citrine for November and pink tourmaline for October.

  6. Topaz - Wikipedia

    en.wikipedia.org/wiki/Topaz

    Topaz is a silicate mineral made of aluminum and fluorine with the chemical formula Al 2 Si O 4 (F, OH) 2.It is used as a gemstone in jewelry and other adornments. Common topaz in its natural state is colorless, though trace element impurities can make it pale blue or golden brown to yellow-orange. [7]

  7. Jewels of Diana, Princess of Wales - Wikipedia

    en.wikipedia.org/wiki/Jewels_of_Diana,_Princess...

    As a teenager, Diana wore a gold choker with a 'D' pendant. [9] In 2017, a sterling silver 'D' necklace owned by the princess as a teenager sold at auction for around US$8,000. [10] [9] Diana was photographed wearing her initial necklace as a nursery assistant while still dating Charles. For her 16th birthday her friends gifted her a gold ...

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