This was a new one on me....I had no idea that a normal prismatic quartz could be twisted, without having the multiple-growth pattern of a typical twisted, or gwindel, quartz. It would be a really good Swiss quartz anyways but moreover, this HUGE smoky quartz measures 15 inches in length and is CLEARLY twisting subtly, as you can see in the pics. AND it is doubly-terminated. AND it is GEMMY throughout. It has only a few small dings of no real consequence. AND, to cap all this off, it has a large NORMAL GWINDEL attached to it, in the lower-right, by way of a totally crazy accent. The gwindel is undamaged save for a small conchoidal fracture on one back edge, that isn't visually apparent at first. Can you imagine collecting this monster in an alpine cleft, keeping it so nearly pristine, and hauling it down intact?! The piece is much better in person - hard to photo, as you can imagine.