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  2. 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.

  3. Do You Know Your Birthstone? Here Are the Colors and Meanings ...

    www.aol.com/lifestyle/know-birthstone-colors...

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  4. Opal - Wikipedia

    en.wikipedia.org/wiki/Opal

    A Peruvian opal (also called blue opal) is a semi-opaque to opaque blue-green stone found in Peru, which is often cut to include the matrix in the more opaque stones. It does not display a play of color. Blue opal also comes from Oregon and Idaho in the Owyhee region, as well as from Nevada around the Virgin Valley. [17] Opal is also formed by ...

  5. Gemstone - Wikipedia

    en.wikipedia.org/wiki/Gemstone

    When jewelry containing sapphires or rubies is heated, those stones should not be coated with boric acid (which can etch the surface) or any other substance. They do not have to be protected from burning, like a diamond (although the stones do need to be protected from heat stress fracture by immersing the part of the jewelry with stones in the ...

  6. List of individual gemstones - Wikipedia

    en.wikipedia.org/wiki/List_of_individual_gemstones

    Andamooka Opal, presented to Queen Elizabeth II, also known as the Queen's Opal; Flame Queen Opal; Galaxy Opal; Halley's Comet Opal, the world's largest uncut black opal; Olympic Australis Opal, reported to be the largest and most valuable gem opal ever found

  7. Trollz (TV series) - Wikipedia

    en.wikipedia.org/wiki/Trollz_(TV_series)

    Opal Trollangel: Opal is Coral's main friend. She has tan skin and light-pink hair with a sky blue hair tie. Her gem is in the shape of an oval. Jade Trollcroft: Jade is Coral's secondary friend. She has spiky lime green hair. Her gem is in the shape of a thin diamond.

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