Posted by Beth on October 20, 2015, 4:48 am, in reply to "Re: ray diadem (ed)"
And possibly the Ray diadem would be the tiara which went to Princess Beatrice which she later mounted on a band of other diamonds? It definitely was not a grand tiara/diadem/head jewel.
I suspect that how we use (or understand) the word diadem today does not necessarily mean a substantial tiara/head jewel in the sense it is understood today.