It is said to be a "stone of relaxation" because it has a gentle energy and is highly effective in suppressing irritation and anxiety, and healing stress. It is said to help calm the autonomic nerves, soothe irritation, and restore a peaceful and stable mind, leading to clear judgment, as well as enhancing concentration and memory. We have received many happy comments. Thank you very much. We carefully select the stones and make them with sincerity. We ask that you wear it on your left hand. Inner diameter 16. Stone size 10mm