Size is 1 inch.
This crystal contains an “isis face.”  An Isis crystal has a dominant face which is five-sided with a tall sharp point rather like an arrowhead. a major spiritual symbol that aids your connection to spirit or the Divine mind. They are named for the Egyptian Goddess Isis, and their energy is also associated with Mother Mary.
Smokey Quartz balances the root chakra and is generally thought of as a 'grounding' stone. But, it does much more than that!!  It is very useful for treating stress, depression, fear and panic.  It stimulates the desire for life and survival while giving the courage to make changes and break bad habits that no longer serve you.  Smokey Quartz is a great meditation stone, aiding the alpha state; use if for hypnosis also.  Some find this crystal to be a powerful protection stone, simply carry it with you when you feel you are in need of 'extra' protection.