My fiance recently purchase a diamond rated: G SI3, and we received the mini certificate. We have not requested the full certificate yet. On the picture of the diamond where they mark the clarity I noticed a black line on the bottom of the stone that goes down from the edge then comes back up to the edge. Is this an extra facet, chip or what? It isn''t very noticable when looking at the diamond, but I am concerned that this may cause a chip, etc. I haven''t yet had it appraised, but plan to do so. Can anyone set my mind at ease?