by hilbell » Mar 19, 2012 Hi experts. Thanks ahead of time for your insights... The center stone in my engagement ring is a 2.5CT E - SI1. According to the GIA ratings, I thought this meant that no flaws should be visible to the naked eye, but it has a black speck in it that I can see most of the time in most lighting conditions. Isn't it only supposed to be visible with 10X magnification? The GIA report does note the flaw, so I do think I have the right GIA report for the stone, but I'm no expert either. I guess my question is, did I get ripped off and is this not properly rated? My family has bought a lot from this jeweler, so I do think that I could go back, but I'm not sure what to ask for. Thanks!!