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 ...

Diamond buyers today face a decision that didn’t meaningfully exist a decade ago: lab-grown or natural. Both are real diamonds — same chemical composition, same hardness, same brilliance — but they ...

Michael Goldstein Ltd. recently published a Summer 2002 antique-cut diamond price guide, available by mail or on the Internet free of charge to qualified members of the jewelry trade. The Guide To ...

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The diamond market is not a single market. It is a chain: miners or growers, cutters and polishers (India plays a major role in this link), wholesalers, brands, and finally consumers. Prices are ...

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A BIS hallmark provides information about the purity of the gold in a jewellery article. It does not, by itself, certify the ...