Dalmation thumb / worry stone.
4.5 cm across
 
Dalmatian Stone
Stone for nightmares
Composition: SiO2
 
It is a stone of protection from nightmares, depression, and negative thinking. It is also particularly beneficial for people who have trouble relaxing and having fun. Lessens or removes disillusionment. Very grounding energy. Increases loyalty and is beneficial for long term relationships.