A couple of weeks ago i posted that i found a black inclusion on my new cushion. Well, don''t i feel like a loser! After staring at this very visible mark on the side of my diamond all this time, i finally decided to take a sharp object (a safety pin) and try and remove it. Well - it went away. Some black something must have gotten stuck in between the basket and the diamond while it was being set. I can''t tell you how many times i have cleaned it with a toothbrush since i''ve had it and the mark never budged. I can''t believe i waited this long to try something sharper. I am so relieved and thrilled that my SI1 is now officially eye-clean!!!