A variety of Quartz crystal ranging in color from light to dark brown to black ( also called Morion )Smoky Quartz is a base chakra stone. It awakens your physical cellular consciousness. For a long period setting up this shop I'd been working long intense hours and suffered migraines. Working with Smoky, my physical consciousness woke up and kept sending me to sleep ! Well, that's what my body needed. As I realised what was going on and learned how to listen to my body I was able to slow down when needed. Haven't had a migraine in 20 years since. So this is a wonderful stone for raising consciousness of the physical and learning to deal with stress. It helps with grounding and clarity on all levels.