Peter Gumbel talks to Stephen Lussier about the state of the diamond market.
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Stocks around the world have been tumbling in reaction to the dramatic news on Wall Street.
In doing so, financial markets are trashing one of the fashionable economic theories of the past couple of years: that the rest of the world can "decouple" itself from the U.S. and keep on growing strongly.
But that may not be the whole story. Just ask Stephen Lussier, an executive director at De Beers, the huge diamond group.