Obsidian, which is made of volcanic glass, is known as a protective stone, and for the removal of negativity, for grounding, and for creating a sense of freedom. Physically, it is said to increase circulation, and to detoxify the body.
Peridot Jasper is one of many types of jasper, all of which are said to protect from negativity, stabilize emotions, and to promote good will and generosity. Shades of green jasper are considered to boost the immune system and to help with restful sleep.
Riverstone is said to accelerate positive change, especially in conjunction with other treatments, such as herbal therapy.