Authentic Tumbled Stone. 
 
Worry stones are smooth polished crystals. They have a thumb-sized indentation so you can carry it in your pocket and rub it for relaxation and stress relief.
 
GREEN AVENTURINE PROPERTIES: 
Vitality 
Confidence 
Optimism and Peace 
General Healing 
Prosperity and Luck 
Comfort 
Protector of Heart 
Settles Nausea 
Calm