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RAPAPORT… 
New Diamond Technology (NDT) unveiled a 10.07-carat lab-grown
diamond that it claims is the world’s largest polished blue synthetic diamond.
The emerald-cut, fancy deep blue, SI1 stone was graded by
the International Gemological Institute (IGI) in Antwerp and put on display at
the Hong Kong Jewellery & Gem Fair last week.
NDT, headquartered in St Petersburg, Russia, sa…

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