Kate adds Sparkle to Jenny Packham Gown for National Portrait Gallery Gala

Tonight, the Duchess of Cambridge carried out her first official engagement of the year.  She attended the Portrait Gala at the National Portrait Gallery in London in her role as patron. The dress code for this evening's event was "black tie with a touch of sparkle", and the Duchess certainly looked the part in a ink blue Jenny Packham gown, previously worn to the 100 Women in Hedge Funds Gala at Kensington Palace last October. 

There was however a sparkling addition to her outfit tonight. Adorning Catherine's neckline, was a priceless diamond necklace, on loan from Her Majesty the Queen.  It is reported that the necklace was a wedding gift to the then Princess Elizabeth from the Nizam of Hyderabad, then King of a state in India.

Kate paired the necklace with her much loved diamond earrings, believed to be a wedding gift from Prince Charles.

Kate completed the look with her trusty black suede Jimmy Choo Cosmic Pumps which are available from  Net-A-Porter for US$695

Jimmy Choo Cosmic US$695

12/02/2014 UPDATE:

It appears the Duchess of Cambridge has a new addition to her ring collection. Along with her sapphire engagement ring and wedding band, it was noted that Kate was also wearing a diamond eternity band, reminiscent of this one by Tiffany & Co. Currently there is no official ID or any further details on the new ring.

29/05/2014 UPDATE:

After some exhaustive research, My Small Obsessions has confirmation that the ring is the Annoushka Eclipse Diamond Eternity Ring. The 2mm wide ring features brilliant-cut micro pavé white diamonds hand-set into a 18ct white gold eternity band. It retails for £820.

Image credit: My Small Obsessions