This superb specimen of faden quartz has a very sharply defined white bubble line running up the middle of tabular quartz crystals. The crystals are all flattened (tabular) forms, and are sharply terminated on one side. The white line zone looks like a very thin tornado funnel, is about 3.5 mm wide, and stands out nicely against the very clear gemmy quartz that makes up the rest of the crystal. It's rare to find a faden crystal with such a sharp white line, and this one is exceptional.