Royal historian Hugo Vickers told Peoplemagazine that the Queen's accessories have a double purpose: not only are they glittery and aesthetically pleasing, but they also serve as communication devices.
When the Queen is ready to end a conversation or a social event, she’ll shift her handbag from one hand to the other. This gives a signal to her handlers: time to go.
If you happen to be in conversation with the queen and you see her do this, don’t fear, says Vickers, it will be done 'very nicely'.
If she places her bag on the floor however, she wants to leave the conversation immediately.
Spinning her ring apparently has the same effect as putting the bag on the floor- abort conversation right now.
Take note. You know, in case you ever find yourself talking to the Queen of the United Kingdom.