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  2. Opal - Wikipedia

    en.wikipedia.org/wiki/Opal

    The Wollo Province opal was different from the previous Ethiopian opal finds in that it more closely resembled the sedimentary opals of Australia and Brazil, with a light background and often vivid play-of-color. [37] Wollo Province opal, more commonly referred to as "Welo" or "Wello" opal, has become the dominant Ethiopian opal in the gem ...

  3. File:Black opal (Stayish Mine, Wollo Province, Ethiopia) 6 ...

    en.wikipedia.org/wiki/File:Black_opal_(Stayish...

    Once colloids get as large as about 240 x 10-6 mm, red color is seen (Carr et al., 1979). Not all opals have the famous play of colors, however. Common opal has a wax-like luster & is often milky whitish with no visible color play at all. Opal is moderately hard (H = 5 to 6), has a white streak, and has conchoidal fracture.

  4. Opalescence - Wikipedia

    en.wikipedia.org/wiki/Opalescence

    Opalescence or play of color is an optical phenomenon associated with the mineraloid gemstone opal, [1] a hydrated silicon dioxide. [2] This effect appears as a milky, translucent glow that changes with the angle of light, often creating a soft, pearly sheen that can display various colors or hues.

  5. Talk:Opal - Wikipedia

    en.wikipedia.org/wiki/Talk:Opal

    Ethiopian opal is one of the best opals in the world. It is different from the Australian opal because first, the color. There are many varieties of color. Second, the quality. It will not craze or crack once it is cured. I bought this opal for the last five years and have had no problems in crazing and none of them were fake.

  6. World's most expensive opal literally glows in the dark - AOL

    www.aol.com/news/2015-08-13-world-s-most...

    In fact, as it gets darker around the opal, the opal appears ever more vibrant. The stone's vivid and sparkly nature is in stark contrast to Coober Pedy, Australia where it was discovered.

  7. Opalite - Wikipedia

    en.wikipedia.org/wiki/Opalite

    Opalite is a trade name for synthetic opalescent glass and various opal and moonstone simulants. Other names for this glass product include argenon, sea opal, opal moonstone, and other similar names. [1] [2] It is also used to promote impure varieties of variously colored common opal. [1]

  8. Mining in Ethiopia - Wikipedia

    en.wikipedia.org/wiki/Mining_in_Ethiopia

    More and more gold mines are being located, such as in the Afar region and in the Konso woreda in south western Ethiopia. [8] On 30 August 2012 it was announced that British firm Nyota Minerals was about to become the first foreign company to receive a mining licence to extract gold from an estimated resource of 52 tonnes in western Ethiopia. [9]

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

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