Ring appraisals in midtown?

I never got around to having my rings appraised, and now that my 1 Year Anniversary is right around the corner - it occurred to me that I should probably do that soon! Can anyone recommend any places in midtown where I can have my rings appraised? I'm not sure how long appraisals take, but I don't want to leave my rings - I was hoping to just go on my lunch break one day. I thought Macy's in Herald Square did them, but I can't remember. TIA!