Worry stone

Worry stones are smooth, polished gemstones in the shape of an oval with a thumb-sized indentation. They originated in Ancient Greece. Held between the index finger and thumb, rubbing them is believed to lessen one's worries. This action is a type of stim which can often create feelings of calmness and reduce stress levels. They enjoyed relatively large popularity in the 1970s.

ee also

*Mood ring