You could make a wand that has a pentagram instead of a star.
Do you want full make-up with cream base, etc. ? You could have a white base with gray and purple to make the features. Check out this link. Click on Gothic once you enter the site. There is a girl with blonde hair holding a globe. She is wearing the kind of make-up I was thinking about. You have to scroll through the photos to get ther her. "The Witch" is the name of the photo.
http://necrobabes.org/darkfairies/
or you could go in another direction and be disheveled. Crooked glasses, broken wand, drooped stocking on one side, bed-head, stain on the dress, etc.