They may not know his name, but jewellery collectors have almost certainly coveted his work.
The world’s most recognisable brands call in Glenn Spiro when they need one-off couture items – which they then present to clients under their own names.
The master jeweller and former Christie’s expert is a designer – about 200 pieces a year leave his Geneva workshop – and one of a handful of dealers worldwide who trade in the rarest and most precious gems, flying them around the globe until they find the right buyer.
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