Thank you all for sharing your knowledge and photos. Thank you Henri M for the photo of Queen Beatrix showing the hair braid. I have read that the frame of the Duchess of Cambridge's wedding tiara was also disguised by a hair braid.
--Previous Message-- : I thought the Wurtemberg pearl tiara and the : favorite diamond tiara were mentioned. : : : --Previous Message-- : I believe platinum is the most heavy metal, : then comes gold, then comes silver. The : metal palladium (a sort platinum) however is : lighter than silver. So in theory a platinum : or golden frame replaced by a palladium : frame can result in half the original : weight. : : I am not sure about it, but it looks like : the diadem worn by Queen Máxima on : Investiture Day has been re-set. When it was : re-set in a metal like palladium, that would : have made it much lighter. Even so light : that Queen Máxima could wear it without a : wrapping around the frame. : :