The Thumb Stone is made of carnelian (burnt) and measures approx. 5.0 x 3.2cm.
Synonyms for the name carnelian are coralin/coraline, blood agate and flesh agate; sometimes wholesale carnelian is also called serdolik.
Thumb Stones owe their name to their use as a massage stone for the thumb. An ideal hand caress stone, its flat shape makes it easy to carry around in your pocket. Carried in the pocket, it encourages - even unconsciously - to take it in the hand.
The Thumb Stones are also called Worry Stone. This form of the hand charm is taken in stressful situations with pleasure in the hand to play around with it and to become so a little more calm.