This is a very grey Smoky Phantom Tower which geologically is called smoky quartz. You can see phantom lines, penetrating crystals and it has a rare Dow formation of the faces. This means 3-7-3-7-3-7 edge face configuration. At one stage I always found these master crystals easily in a whole batch of crystals. It will not appeal to the decorative buyer but will call to the person who loves the quirky and feels the shamanic power of this piece. As it is not considered high grade it does mean you get a large generator for a lot less. Enjoy the video too.
Read more about the crystal formation in formation here and here.
If you are wanting to develop your shamanic side you will feel something very special coming from the smoky phantom tower crystal friend.