I don’t know if it’s because I talk with my hands or am just a little bit of a klutz, but I suspect I’d whack the top off this intriguing ring in short order. By Christina Alexiou, it’s as the title suggests, a ring with a movable top part. The pyramid shaped tourmaline (a cross between a cabochon and a sugarloaf cut, I think) is set in 18k yellow gold.

This sell for £4,273.11.