A worry stone is a smooth piece of polished stone. They are usually made from semi-precious gemstones for their metaphysical properties and are shaped like an oval with a thumb sized indention. The stone is held between your index finger and thumb. It is called a worry stone because by rubbing the stone with your fingers, it takes away your worries. Worry stones are sometimes called thumb stones or palm stones.|
This is an example of a worry bloodstone. Bloodstone is said to improve one's circulation and energy.
See here for a detailed guide of more worry stones.