I wish I had read these posts before my trip last week.
I bought a pair of Tanzanite earrings (1.28tcw) for $860 and had them reset in gold for $140. I got home and was told they would be worth between $400 and $500 if they weren't CHIPPED.
Now I begin the fight to get my money back. I have contacted the Customer Service of DI and await their return call.
I can't believe I was so stupid - they are beautiful but not worth $1000.