Most jewelry stores in the Diamond District open by 10am and close by 6pm.
Bargaining is common; don't hesitate to negotiate prices.
Many stores accept credit cards, but some may prefer cash.
I have been using it now for 3 months and it saves me so much research. Reduces the need to call and double check every time.
How did I not know these places existed?! Atly's scoring is a lifesaver, now I can finally find THE spot without wasting time Googling my life away.