What is the name of this painting genre?
To me, this seems like it is charcoal pencil art.  Google that term and check out the Images it brings up.  They are very similar.

The way this is created is the artist uses a charcoal pencil to draw on the paper, then smudges the charcoal into the picture they want to make.  The powder is actually the charcoal.  In this case, the light color comes from the paper the eye/face is drawn on.