One was the sapphire and diamond eternity band she debuted to congratulate Team GB in August, and another was a new eternity ring. While it's not clear where the latter came from, some have mused ...

but royal fans noticed that her iconic sapphire and diamond engagement ring was missing from her ring finger. Instead, she sported the glittering eternity band she debuted last summer in its place ...

Kate stunned in a brown and burgundy ensemble, but she appeared to have ditched her £300,000 engagement ring and opted for her £1,500 eternity ... her sapphire and diamond engagement ring ...