I picked these up after having a crystal healing session with Sarah. I'm new to using crystal energy (and honestly, a little timid at first) but Sarah makes it so easy. She has put a lot of time and effort into selecting high quality stones and then takes she steps it a step farther by actually giving you a little "cheat sheet" into their properties! My coworker is crystal obsessed and literally drooled over the selections here! You can definitely tell that Sarah is passionate about what she does.