Kate wore this long necklace a few times in 2007.
She wore it to the “Time to Reflect” book launch in November 2007.
The necklace features black and white (plastic?) pieces in round and square shapes. It also features cut-out circles and large “links”. At the bottom of the necklace is a large metal pendant. I estimate this necklace to be about 20-25 inches long, because it falls just at Kate’s midsection.
It’s hard to see, but here is a close up:
Kate also wore this during a trip to a nightclub. She wore it over a sparkly black minidress.
You can better see the metal pendant here.