Many thanks for the link Altezania Monpox, but I strongly suspect that the concept of the bracelet being used as a base (as depicted in Ursula's page) is the result of photoshopping. I haven't seen any images of the tiara being worn which show the bracelet in use for the tiara.

For a lot of such images see this Pinterest account

https://www.pinterest.se/lovebooksabove/the-edward-vii-ruby-tiara/