Hello! I think I have found the perfect diamond. It is an SI1.. and when I asked the vendor for a visual inspection, he assured me that the diamond was "eye clean" - none of the inclusions are visible to the naked eye.This is what concerns me though- The report also indicated there was some cleavage on the girdle of the diamond. What exactly is cleavage anyways? I did a search for it on the forum, but I was unable to find enough information. Is cleavage something I should worry about? Will it cause the diamond to crack?