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The Rapaport Price List is copyrighted and available only to subscribers. Jewelers and diamond merchants use it to set prices for consumers. Consumers should therefore use the report with caution. [2] These prices are used as the basis for standardization and negotiation of diamond prices around the world.
Martin Rapaport is the chairman of the Rapaport Group and founder of the Rapaport Diamond Report and RapNet, an online diamond trading network. [1] Known for his influential role in the diamond industry, Rapaport has been both a pioneer and a controversial figure, advocating for price transparency, ethical sourcing, and the commoditization of diamonds.
Since the 1950s, techniques can produce gem-quality diamonds of essentially any desired chemistry in sizes up to about 1cm. [6] Although some manufacturers do label their synthetic diamonds with serial numbers, there is no guarantee that a given diamond is not man made, although sometimes an unnatural chemical composition or pattern of flaws may suggest a diamond is synthetic.
As an example, a 0.99-carat diamond may have a significantly lower price per carat than a comparable 1.01-carat diamond, because of differences in demand. A weekly diamond price list, the Rapaport Diamond Report is published by Martin Rapaport, CEO of Rapaport Group of New York, for different diamond cuts, clarity and weights. [33]
By April 5, 2017, there had only been six offers for the diamond. In response, the deadline was extended to May 10. [1] The diamond was bought by Graff Diamonds in December 2017 for $6.5M USD via auction. [6] The diamond auction was facilitated by The Rapaport Group, [7] a corporation specializing in diamond trade.
This is a partial list of the largest non-synthetic diamonds with a rough stone (uncut) weight of over 200 carats (40 grams). [1] The list is not intended to be complete—e.g., the Cullinan (formerly Premier) mine alone has produced 135 diamonds larger than 200 carats since mining commenced.
Even though rough diamond prices are falling, buying a one-carat round diamond at the store is on average 3% more expensive now than it was in January 2020, he said.
The Rapaport Group, chaired by Martin Rapaport, went so far as to ban traders on its internet diamond trading network from trading any diamonds from the Marange fields. [ 33 ] Towards the end of 2009, it was claimed that Marange diamonds were being smuggled out of Zimbabwe through Mozambique .