A guest on the popular show Antiques Roadshow brought with her an amethyst necklace, a family heirloom, that supposedly belonged to a British socialite and the mistress of King Edward VII. If the guest was looking for a nice pay day, her hopes were quickly dashed when jewelry expert Sarah Churgin appraised the piece at just '$3,000 to $4,000' after explaining the history behind it. 'If it had royal provenance, we can double that price,' Churgin said. Before Churgin flexed her precious jewelry expertise, the guest was giddy to retell the story of how she acquired mistress Lillie Langtry's amethyst necklace. She said: ... (full story)