Wulfenite    Ojuela Mine, Mapimi, Mapimi Municipality, Durango, Mexico.  Ex. Caroline Les collection.  This one is 7.7 x 3.6 x 2.2 cm overall with crystals to 1 cm each.  The front shows a heavy coating and the back has more dispersed crystals.  All the crystals, front and back, are damage-free.  They are transparent, show unusual stepped edges, and a few are even curved.  The color is a brownish-yellow and the luster is very high.  $250