There are currently two startups in Florida manufacturing Diamonds..Wired back issue somewhere.
Can't be told from the real thing as they are the real thing. the market they want though is diamond based computer processors as opposed to silicone....thus bringing us upto the kind of clock speeds that will really bring the Information age to fruition...worth more than bling in the long run.. They are trying to figure out now how to "grow" them in sheets.