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 double-terminated widthwise. The white line zone looks like a very thin tornado funnel, is about 3 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.