Good idea, prob does not harm the stone so much that way, I'll bet..... On Thu, 13 Jan 2000 20:12:42 EST CARR2009@aol.com writes: > Didn't know the trick of the black light. Will have to try it. > Another way > is to use foam shaving cream, then use a squeezie and pull across it > - it > will mark the writing for you. > Sharon R WA State