Joan wore this gown in episode 152 of season 7 "Romance".
This gown is black fabric woven with rows of flat, gold, metallic thread with various levels of exposure to create the pattern. The pattern is free flowing and abstract, consisting of what looks like the swirled ripples of oil on water and also leaf-like formations. The neckline is plunging and held together with a length of metal wire sewn underneath the fabric from shoulder to shoulder across the front of the gown. The gown features a low cowl back, large shoulder pads, a high center slit, and a double fish-tail sash that is gathered at the middle front below the waist. The inside of the gown contains a built in corset and black satin slip anchored with small weights on either side.