These "pocket tranquilizers" use a form of reflexology, or nerve pressure. Rubbing the smooth surface of the stone puts pressure on nerves within the thumb that may release endorphins, the brain's natural relaxants. Worry stones may vary in sizes.
AVENTURINE is said to attract luck and prosperity. Said to uplift the spirits and enhance the sense of humor. It has a positive effect on the psyche and strengthens one's sense of well-being.