A 7 chakra thumbstone is a type of crystal that is shaped like a small oval, with a flat surface on one side and a rounded, thumb-shaped depression on the other. 
 
A 7 chakra thumbstone is commonly used as a tool for meditation and healing practices. The seven chakras are energy centers located along the spine, and each chakra is associated with a different color and aspect of our physical and emotional well-being. The thumbstone can be used to focus on each chakra and promote balance and harmony in the body.
 
A 7 chakra thumbstone is made of various crystals, each of which is believed to have different properties and healing effects. For example, amethyst is often used for spiritual awareness and intuition, while red jasper is associated with grounding.
 
The small size and shape of a 7 chakra thumbstone make it easy to carry around in a pocket or purse, so it can be used for meditation or healing on-the-go.