I just read in another thread about how IGI is the least reputable grader and various things to look for when purchasing a diamond. Just wondering if anyone has any insight to offer regarding the following scenarios: 1.If you buy a diamond certified by IGI then find out from a different appraiser that specs are way off, lower than stated carat size, color, clarity, etc. do you have any recourse against the seller? 2.If a jeweler only uses IGI or EGL (anyone except GIA) can you ask/pay for the jeweler to get a GIA appraisal before purchasing? I guess I'm just trying to figure out how a buyer can protect oneself if they purchase a ring certified by someone other than GIA. Any input is greatly appreciated.