It is posted under a tiara, but it looks like a headband to me... what do you think?
http://cgi.ebay.com/Blue-Sapphire-Crystal-Bridal-Wedding-Tiara-18-Karat-/170627298073?pt=UK_Wedding_Clothing&hash=item27ba2df319#ht_3203wt_1028
I really like it because of the look, but it looks a lot more like a head band.