Set of four 8 1/2" pattern glass plates in a chartreuse yellow-green color. These came from the estate of a collector of vaseline glass, and he had a lot of pieces in vaseline and yellow-green glass. We do not have a black light, and aren't entirely sure what to do with it if we had one - we have to admit we know very little about this type of glass, but these don't look all that old to us? The color is very pretty, though! And all are in very nice condition, without scratching, chips, or wear.