Object of desire & Auction results

On last week’s BBC Antiques Roadshow, jewellery expert Joanna Hardy tested presenter Fiona Bruce’s knowledge of gem stones with three stunning rings: the first set with an emerald, the second with a diamond and the third with a ruby. Which one, Hardy asked, was the rarest and most valuable?

With utter confidence (and the audience nodding their approval), Bruce gave her verdict – and got it all wrong. She plumped for the diamond, ...