An amazing formation to strengthen your bonds and connect with not only others but also with yourself, Rhyolite is great in assisting you in your search for yourself. 
This crystal helps to ground you and bring strength and stability with determination in your energy. Helps to foray into new ventures keeping you anchored to your core competencies. 
It is effective for healing issues pertaining to bones and muscles. Also effective for releasing excessive toxins to earth and thus improving your immunity. 
This is not so common crystal and hence available in limited quantities.