jeweller

In the last reported financial year, the group opened 22 showrooms, refurbished 15 and acquired 15 through jewellers Ernest Jones.

When the earrings were brought back to the Tiffany's, the store's master jeweller confirmed that serial numbers on the jewellery matched the stolen pieces, Mr Goss said.

The medals were designed by French luxury jeweller Chaumet and are set with a piece of iron taken from the Eiffel Tower during its renovation in the 20th Century.

A jeweller working on London's Bond Street confirmed he bought more than half of them for £10,000 shortly after their disappearance, Sotheby's said.

The pearl will be auctioned at Lyon and Turnbull’s Edinburgh auction house as part of the Cairncross Collection of pieces from the Perth jewellers, with bids also accepted online.