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  2. 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]

  3. List of individual gemstones - Wikipedia

    en.wikipedia.org/wiki/List_of_individual_gemstones

    Servilia's pearl, most expensive pearl of all time; Rubies. DeLong Star Ruby; Midnight Star Ruby ... Chalmers Topaz, a 5,899.5-carat (1.17990 kg) cut topaz.

  4. Gemstones of Pakistan - Wikipedia

    en.wikipedia.org/wiki/Gemstones_of_Pakistan

    2nd row: rare purple topaz, champagne coloured topaz on albite, rare topaz and green hydroxylherderite matrix. 3rd row: naturally cut topaz, irradiated blue topaz, white topaz on matrix Rare purple-lavender hued topaz on a matrix from Katlang in Mardan District, Khyber Pakhtunkhwa [1] [2] There are many types of gemstones of Pakistan.

  5. 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.

  6. The Victoria's Secret 'Fantasy Bra' Was a Fashion Show ... - AOL

    www.aol.com/victorias-secret-fantasy-bra-fashion...

    The $2 million “Fireworks” Fantasy Bra designed by Mouawad included a bra and detachable belt adorned with more than 6,500 precious gems, including diamonds, blue topaz, yellow sapphires and ...

  7. Aquamarine (gem) - Wikipedia

    en.wikipedia.org/wiki/Aquamarine_(gem)

    Dark-blue maxixe color can be produced in green, pink or yellow beryl by irradiating it with high-energy radiation (gamma rays, neutrons or even X-rays). [21] Naturally occurring blue hued aquamarine specimens are more expensive than those that have undergone heat treatment to reduce yellow tones caused by ferric iron. [ 6 ]

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