I have read that Queen Alexandra provided her own diamonds so I imagine that is why they were removed soon after.
I shall now go to a good souce for details of diamonds used for Queen Mary's crown.
--Previous Message-- : I wonder where the diamonds for Queen Mary's : crown did come from. The diamonds for Queen : Alexandra's crown were either rented or : taken from somewhere they were returned to. : The regal circlet provided the diamonds for : Queen Elizabeth's crown. But I have not : seen anything about a source for the : diamonds in Queen Mary's crown. I wonder if : some were Cullinan cleavings. (I ask this : in spite of the problem with speculation : quickly becoming fact!) :