Geoffrey said: “Well, I think there would be serious competition over this object wherever this was sold.
“And I am in no doubt that any Lalique collector would be prepared to pay between £8,000 and £10,000.”
There was a huge gasp from the people who had gathered around as well as from the guest herself who couldn’t believe what she had just heard.
The guest said: “£10,000? Oh my goodness me! And to think I was wearing it all those years and never thought about it.”
Antiques Roadshow can be streamed on BBC iPlayer.