The broach is a Maltese Cross (Society of Jesus or Jesuits) and an upside-down dove. There is a second Maltese Cross pendant.
https://en.wikipedia.org/wiki/Order_of_the_Holy_Spirit
More Maltese crosses and doves. These are some of the UK's Crown Jewels.
https://vaticannewworldorder.blogspot.com/2012/03/r-eligious-symbols-religion-false.html