The Duchess of Cambridge is expected to attend her first ever state banquet at Buckingham Palace in just over a week's time. But which tiara will the Duchess choose for her debut state banquet appearance?, October 12, 2015

The Strathmore Rose Tiara which belonged to the Queen Mother and was a present from her parents in 1923

The diamond and pearl-encrusted tiara was made in 1914 and has a strong French influence with a neo-classical design of 19 diamond arches, each cradling an oriental pearl drop

Queen Alexandra's Russian Kokoshnik Tiara is one of the largest options for Kate to choose from.   Formed of 61 platinum bars and bejewelled with 488 diamonds, it was a gift to Alexandra on her silver wedding anniversary in 1888 and is based on a Russian-style peasant girl's.

Catherine, Duchess of Cambridge wore the Cartier Halo tiara on her wedding day in 2011

The Duchess of Cambridge is expected to join the Queen at the state banquet at Buckingham Palace for the first time. She will be required to wear a tiara and there is much speculation over which she will choose.   She wore the Cartier Halo tiara on her wedding day in 2011

Kate wore the delicate Cartier 'Halo' tiara, loaned by the queen on her wedding day in 2011

The Queen Mother wore the Papyrus tiara with a lotus-flower design, which Kate choose for an evening reception in 2013. Curiously, The Queen Mother followed 1920s fashions and wore her tiaras as a bandeau low on her forehead

The Queen Mother wore the Strathmore Rose Tiara in the 1920s after being given it in 1923

Princess Diana wears the Spencer tiara to a banquet in Canberra, Australia in 1985.  Kate could select the Spencer tiara in tribute to the Duke of Cambridge's mother

The Queen has been pictured in the glistening creation on several occasions

Queen Elizabeth II wore Queen Alexandra's Russian Kokoshnik Tiara.

Diana Princess of Wales was given the Cambridge Lover's Knot tiara by the Queen in 1981

Queen Elizabeth II in a Queen Mary's Girls of Great Britain and Ireland Tiara.  It is said to be one of the Queen's favorites and she is likely to wear it herself.
 

Queen Mary's Girls of Great Britain and Ireland Tiara
It is unlikely that Kate will wear this tiara as it is one of the Queen's favourites and she may be wearing it to the banquet herself.  The tiara was given to Princess Mary of Teck from the 'Girls of Great Britain and Ireland' when she married the  Duke of York, later King George V in May 1893.  It was made by Garrard and has a scrolled and foliage-inspired form with diamonds pave-set in silver and gold. The magnificent piece also included 14 large oriental pearls and could be worn as a necklace or even dismantled and mounted on a smaller frame as a coronet.  In 1914, Queen Mary had the tiara adapted to take 13 brilliant-cut diamonds to replace the pearls. For Princess Elizabeth's wedding to Prince Philip in 1947, Queen Mary gave her granddaughter the tiara and a bandeau base.  This is the tiara most closely associated with the Queen as it is the piece she is wearing in banknotes and coinage.

There is speculation the Queen may now have given Kate the Elizabeth II family order - a jewel encased image of the Queen on a chartreuse yellow ribbon, pictured here on Camilla Duchess of Cornwall

As the royals entertain the Chinese leader Xi Jinping, the Duchess is likely be seated in a prominent position on the grand horseshoe-shaped table