Astrophyllite is a wonderful stone who's main mission is to infuse your system with light.
It is thought to be a soul keeper in the sense of bringing light back into your soul after a dark time and with that light reconnecting you to your self love. It is said to help you release and forgive past wrong-doings, by you or by others, releasing you to progress and move forward.
Astrophyllite is said to help you to move forward in your life physically and emotionally bringing with it honesty and clarity. It's job is to illuminate things within you that need addressing which are holding you back.
Chakra wise it's power is around the 3rd eye and the Crown chakra, many people who feel they have extra terrestrial origins or have never felt quite "at home" here have found this stone to be a comforting companion.