Hahaha, I'll give you one guess, and it ain't "your got a deal."
Think about it, who benefits from high appraisals? You... and them. Certianly not the insurance company that MAY have to pay that amount. You=obvious. Why them? Because when you go to plop down $X,XXX.xx for another one you will think "oh, these things are worth it, just look at the appraisals."
Lemme guess, the person who appraised it also sold diamonds (maybe not this one, but perhaps your next).