Thank you so much Thomas for this intriguing history. I am not sure why I had the mistaken idea that the necklace was now in the Louvre. I will put an edit in my post to your work.
Until I read your work I was unaware that the rubies were foiled. I wonder what they would look like without the foil?
Mrs Bradley Martin's collection is one which I hope we will be able to explore in the future.
I hope that you have an enjoyable day tomorrow (your time) for Bastille Day.