This is simply the cleanest, most transparent, window-pane-clean example of a gwindel quartz in this size range that you could wish to own. It actually is a smoky quartz, but it is so clean and clear, there are no fractures and veils inside to enhance the color, that it is a soft smoky color rather than a strong brown-amber-black hue as are most Swiss specimens. It is literally just the perfect Gwindel Quartz miniature, and looks like a drawing from a textbook. Veils and fractures inside, especially at 5 cm and up size, are common here because the freeze/thaw cycle acts on the crystals once a cleft is open, and so they can be preserved for a hundred million years until they get near-surface and exposed to weather, which is why so many larger Swiss quartz crystals have internal fractures (and also why top collectors pay for those without), and why strahlers who find pockets try to clean them out promptly in one season before winter sets in. From a single special pocket seemingly found in 2016, this was one of a suite of 5 pristine and similarly gorgeous specimens, all showing different crystal habit, that Brent purchased fresh from the collectors (called, strahlers) through the Swiss dealership Siber & Siber in 2017. An excellent summary of the more technical aspects of these amazing styles of quartz, called Gwindels after the German word for "twisted," can be found here: http://www.quartzpage.de/gwindel.html