The largest diamond factory in the US is leading a revolution in the jewelry industry

Sarah Jacobs New York City's Diamond District, located on 47th Street between Fifth and Sixth Avenues, glitters and sparkles, the well-lit diamonds in shop windows luring your eyes in. But what shoppers might not realize is that behind extremely tight security and a mazes of various locked doors, diamonds are being examined, cut, and polished in the heart of Manhattan's midtown.  Online diamond retailer Ritani is one of the brands whose diamonds are perfected in a factory in the city, and w...