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   "keywords_main" : "Oppenheimer Blue",
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         "name" : "Oppenheimer Blue",
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         "slug" : "/wiki/diamond%20color"
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   "hash" : "026c4831a1ea8851a7f6826907a535f4002a2726",
   "text" : " Oppenheimer Blue, a large and rare blue diamond, is sold for $57.6 million USD, the most expensive jewel ever sold at an auction. ",
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         "permalink" : "https://www.reuters.com/article/us-art-diamond-idUSKCN0Y92R4",
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         "name" : "Swiss Info",
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   "date" : "2016-05-19",
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   "related" : [
      {
         "text" : "A blue diamond is found in Cullinan, Gauteng, South Africa. ",
         "score" : 1,
         "date" : "2014-01-22",
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