Thumbstones are good for therapy of hands and fingers. Because of their smooth form they invite us to play with them. These exercises are god for the muscles and keep the agility of the knuckles. As the thumbstones are very flat nobody will see them in your pocket and so they can go with you to any place. Thumbstones we have out of Agate, Aventurine, Rockcrystal, Dumotorite, Howlithe, different kinds of Jasper and Rosequarz.