It is the Lord Mayor of the City of London's Badge of Office.
A tricky one to take, he (the Lord Mayor's stand-in - the Lord Mayor Real is in Turkey) was talking animatedly and I had to take three before I got one in focus.
Tell you what though I got over my "camera in public shyness thing"! I was thinking about this shot for about fifteen minutes while he was talking to us, but I knew if I didn't take this I would regret it.....so flash bash here it is!!
Yes, real diamonds.......it's stunning, and insured for an eye-watering amount of money, so he wasn't going to take it off and let me find a black background and soft lights....and......take ten shots before I got the one I like!