I think the emerald may be real.

Grace scored herself a fancy emerald paperweight at a good price, it wasn't sold as being a real emerald but I think it may be because usually fakes are flawless but this one has a speck inside it just like a real one would.

I think Sideshow Bob may have gotten distracted by an errant label up his jacksie, though I must add that he would never ever become a modern major general with hair like that.