Thanks to What Kate Wore and the blog's eagle eyed readers, one of the pieces on our Kate Middleton Mystery Fashion Items List has now been identified. The pavé diamond disc necklace that the Duchess of Cambridge has worn on several occasions (from Canada Day to Kate's most recent outing at Buckingham Palace) has been ID'd as the Asprey Button Pendant.
Makes sense as Kate's necklace did seem to have BOND stamped at the side, which corresponds with the company's 167 New Bond Street address. Here are some similar pendants from Asprey showing the same button-type style as Kate's:
We can't tell you what a relief it is when a mystery item is ID'd. There is a few more--from Kate's pink boucle jacket in Charlottetown to the Duchess of Cambridge's white ruffled blouse in Slave Lake--that we're still dying to know the origins of.