Girls of Great Britain and Ireland Tiara
The Girls of Great Britain and Ireland Tiara was given to the future Queen Mary as a wedding present in 1893.  The diamond tiara was purchased from Garrard, the London jeweller, by a committee organised by Lady Eve Greville.
The tiara was described by Leslie Field as "a diamond festoon-and-scroll design surmounted by nine large oriental pearls on diamond spikes and set on a bandeau base of alternate round and lozenge collets between two plain bands of diamonds".
Queen Elizabeth II originally wore the tiara without the base and still usually wears it without the pearls. 
- Royal Collection http://www.royalcollection.org.uk/microsites/royalwedding1947/object.asp?grouping=&exhibs=NONE&object=200192&row=16&detail=about
- "BBC News - Palace to host diamond exhibition for Diamond Jubilee". bbc.co.uk. 2011-12-27. Retrieved 2012-01-03.
- Eleanor Harding (2012-01-03). "'Finest pink diamond in existence' to be highlight of dazzling display of Royal jewels at Buckingham Palace | Mail Online". Dailymail.co.uk. Retrieved 2012-01-03.
- Royal Order of Satorial Splendor http://orderofsplendor.blogspot.co.uk/2011/12/readers-top-15-tiaras-1-girls-of-great.html