A small, clear smoky quartz crystal from the Val Giuv, Graubünden, Switzerland, with a large, but rough x-face. The x-face is on the right side, thus the crystal might be a "right quartz" (one would first have to check for the position of the other faces and other signs of twinning, but it is in fact untwinned). The dull surface of the x-face is not unusual, in this case the crystal has been partially covered by chlorite mica, so the effect is amplified.
