Pentagonite is a variety of Cavansite, its vivid color opens the Third Eye, activates inner visions and expands your consciousness. It activates the Soma Chakra, and is able to let you travel to other higher dimensions to come in contact with other beings, and bring back knowledge.
Emotionally it soothes when meditating with this stone.
Being a variety of Cavansite it also brings optimism and inspiration. It is a reflecting stone and mirrors actions to let them come through in a deeper level. It restores destructive behaviors and stuck thinking patterns. It lets you be content with your physical existence and encourages self respect.
It helps to let you think first before going into actions. It combines logic and intuition and therefore it shows how to deal with issues.
It releases endorphins and guides electric impulses in the body which can be felt as a strange sensation.