Diamonds are for ever - or are they? In this age of modern technology, Hermione Cockburn finds out whether the experts can tell the fabulous from the fake, even putting her own engagement ring to the test. producer Amanda Hargreaves
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Diamonds are for ever - or are they? In this age of modern technology, Hermione Cockburn finds out whether the experts can tell the fabulous from the fake, even putting her own engagement ring to the test. producer Amanda Hargreaves