Flashy Blue Rainbow Moonstone pendulum on a simple silver chain. The plumb is a 10mm Rainbow Moonstone bead and the bob is a 6mm one. About 5 inches long. I made a couple of these, they are very similar to the one pictured.
I always ritually craft my pendulums on a Monday or Wednesday when the Moon is Half Full, and this one is also from a batch that I made on the Autumnal Equinox, Sept 23, 2020, for even more balance.