Kate wore this bracelet twice: with her bespoke Alexander McQueen gown to the official state dinner in Malaysia (2012) and to an event in the Solomon Islands (2012).
From the website: “Beautifully designed and made in England this 18ct gold plated bracelet features an intricately detailed tiered feathered leaf design. The designer bracelet measures 17cm in length and will add drama to any outfit. As seen on HRH The Duchess of Cambridge (Kate Middleton).”
The bracelet has a center of four lanceolate-shaped metal pieces arranged parallel to each other. Beneath and above the center are three of the same pieces, three on each end, lengthening the bracelet. This pattern continues with the next two levels: two pieces on each end, then finally one. The ends are finished off with a toggle clasp bar on one end and a hoop on the other. The bracelet is made of gold plated metal (might be silver).
Here it is on Kate:
In the Solomon Islands (it is on her right wrist):
At the official state dinner in Malaysia.
This is her whole ensemble for the night (information on her earrings can be found here):
This is priced at £420 or $655.