On doing a little research I assume my photo is a Ambrotype. I am hoping to be able to date it and confirm either a Ambrotype or Daguerreotype. I believe it is of my G G Grandmother from around 1870's taken in Ballarat. I have one of a male I assume is her husband but its not online as yet. If anyone can offer some advice the photo is at http://www.angelfire.com/folk/ourfamilyphotos/ Regards Kathryn