Not in Chicago, but Brian Gavin Diamonds. Please contact them, I have done 2 recuts with them (currently on my 3rd) and they came out amazing each time.
Lambie, I had a sapphire recut on Wabash after chipping it (twice... !) several years ago. All I can remember is the guy's name is Victor. Let me see when I get home tonight if I have any paperwork on it. I don't think so, but I might because I never throw anything away, LOL.
I’d also contact Stan Perkins at M. Martin & Co 5 S. Wabash—Jeweler’s Mall). He recently bought the business from Steve Martin, but he’s been with the company for over 20 years now. Stan sent my sister’s sapphire to a local cutter when she knocked a gash in hers on her granite countertops. Stan is great to work with!
Yes, Brian Gavin in Houston. There are many jewelers who touch up gemstones. But if I want to recut a diamond into an ideal cut, I'd use Brian Gavin because I can't think of anyone else who recuts to that quality level. It takes several weeks, but the outcome is worth it.