According to Roberts, Queen Alexandra's collet necklace was inherited by Queen Mary who left it to QEII.

I am hopeless at gauging what collet necklace is which, but according to Roberts QEII wore it in Toronto in 2010 - as per the photos below.

Perhaps Franck or Bryce might know if HM has worn it on other occasions.





The necklace looks longer than when worn by Queen Alexandra. Roberts says that 5 of the collets are detachable, and no doubt some were removed so that it sat higher, at the base of Queen Alexandra's throat.

Re Queen Alexandra's wedding gift tiara. Roberts says somewhere (in a footnote I think) that it was inherited by Princess Victoria of Wales and has since been disposed of -- possibly it was broken up and the stones fashioned into something else.