I purchased this at a power stone shop several years ago. I only tried it on and have kept it stored at home. I occasionally cleansed it with moonlight on the night of a full moon. Natural Stones: Aventurine Prehnite Crystal Inner Diameter: 16cm Please understand that this has been stored at home. If you like it, please consider purchasing it. ✪Aventurine✪ It has a gentle energy and is said to be a "stone of relaxation" because it is highly effective in suppressing irritation and anxiety and healing stress. It is said to help calm the nerves, soothe irritation, and restore a peaceful and stable mind, leading to calm judgment, and enhancing concentration and memory. Description excerpt