Kim Kardashian robbery: How do you sell high-profile diamonds?

Kim Kardashian's robbers are reported to have made off with $10m (8.96m euros; £7.84m) worth of jewels, including a $4m dollar diamond ring. But how easy is it to sell on diamonds belonging to one of the world's most famous people?
A stone worth several million euros is likely to have been laser marked, said Neil Duttson, a top diamond trader based in Hatton Garden, London.
The laser makes an invisible mark on the girdle - the side - of the stone, but it isn't foolproof. "The mark can be polished off by someone who knows what they're doing," said Mr Duttson.
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