Hello, a newbie to diamonds here. I was looking in a local jewerly shop in NYC (one of the boroughs, not Manhattan) and I saw a ring that looked to be about .75 carats and had a price tag of $600. Is it me or is that way too low? I like many of the settings that the store has to offer, but I don''t want a low quality stone. Am I better off just going to the diamond district in NYC? Would the prices be similar to those online at say bluenile? Also, how do you keep from getting ripped off? I would appreciate any help. My finance can afford to spend about $3000 for stone and setting.