Michael,

Without revealing what I actually do, which is not secret but private. I am involved with research using diamonds, specifically Nitrogen-Vacancy (NV) diamond experiments. These are actually little defects or color centers that can be used as clocks and magnetometers, of course they are not like the rings you would where but carefully grown substrates with special properties. This is a new and exciting field with lots of potential.

Cheers

Sounds like interesting work Paul, and it's really cool that you're able to do a quick prototype of your experiments!

- Michael