They're not the same. Physically, man-made diamonds tend to be superior to natural ones, or so I'm tood. But that's beside the point for consumers - they mostly

They're not the same. Physically, man-made diamonds tend to be superior to natural ones, or so I'm tood. But that's beside the point for consumers - they mostly don't buy based on physical criteria beyond size. They buy dimonds because it's the done thing, because they're expensive. If diamonds lose that exclusivity De Beers have gone to such lengths to uphold, I think they'll also lose their appeal.