I have many favourites. I usually agregate them by size or by gems. Of course the stunning Fife Diamond tiara is a top favourite of mine also, its so beautiful. Here are some more of my favourites on the category of big tiaras
-Queen Sophia of Greece Diamond tiara (fortunatelly still in the family and not seen for decades)
-The Braganza tiara from Empress Amélia of Brazil and then to Sweden to our delight
-Pss Marie Louise indian tiara, now worn by the Duchess of Gloucester
-The Diamond Boucheron tiara worn by Pss Olga of Yugouslavia, born Pss of Greece