A conman pretended a ‘worthless ruby’ cost £11m to underpin the balance sheet of his struggling company. David Unwin wrongly valued the 10,700 carat “Gem of Tanzania”, once believed to be the largest ...

The plot includes a colossal ruby called the 'Gem of Tanzania', the Crown Jewellers, an African coup, diamond smuggling and a Hollywood star. It involves murky allegations of theft and dodgy documents ...

A giant ruby once thought to be valued at £11m and used to support an insolvent Shropshire construction firm has been sold for £8,000. The "Gem of Tanzania" was entered as one of Wrekin Construction's ...

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