The Poltimore Tiara from the collection of the late Princess Margaret is held by Christie's Public relations manager Rhiannon Bevan-John at the Balmoral Hotel in Edinburgh. (Photo by Danny Lawson - PA Images/PA Images via Getty Images)
The Poltimore Tiara from the collection of the late Princess Margaret is held by Christie's Public relations manager Rhiannon Bevan-John at the Balmoral Hotel in Edinburgh. (Photo by Danny Lawson - PA Images/PA Images via Getty Images)