In a sunlit office on the 23rd floor of the World Diamond Tower, overlooking the corner where 47th Street runs into Fifth Avenue in New York City, men, occasionally couples and sometimes entire ...

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Leibish & Co., unveiled its World of Colors guide for identifying fancy colored diamonds in New York Thursday (January 19). A day earlier, I spoke privately with Leibish Polnauer, the president and ...

New Delhi: The International Gemological Institute (IGI) has reaffirmed its commitment to applying the universal 4Cs grading system - cut, color, clarity, and carat to all diamonds, including ...