What is a Worry Stone?
Wikipedia has a fairly detailed answer which I say by all means go and google should you need to. :)
They are 5/8" thick ATI-425-MIL Grade 38 Titanium Strike Plate Worry Weights. at 2" in diameter they fit most hands comfortably.
Use them as an artesian paper weight for your desk, then pick it up to relieve anxiety. You can trace the labyrinth on the face of the weight to help you equalize and think your way out of a situation.
If you are a cigar aficionado, set them on their side as a Cigar Stand.
Proudly sourced materials & produced in the California, start to finish.